U.S. patent application number 10/364225 was filed with the patent office on 2003-10-02 for compounds having activity as inhibitors of cytochrome p450rai.
Invention is credited to Chandraratna, Roshantha A., Johnson, Alan T., Vasudevan, Jayasree, Wang, Liming.
Application Number | 20030186947 10/364225 |
Document ID | / |
Family ID | 24613339 |
Filed Date | 2003-10-02 |
United States Patent
Application |
20030186947 |
Kind Code |
A1 |
Vasudevan, Jayasree ; et
al. |
October 2, 2003 |
Compounds having activity as inhibitors of cytochrome P450RAI
Abstract
Compounds having Formula 4 wherein the symbols have the meaning
defined in the specification are inhibitors of the cytochrome
P450RAI (retinoic acid inducible) enzyme, and are used for treating
diseases responsive to treatment by retinoids. 1
Inventors: |
Vasudevan, Jayasree;
(Anaheim, CA) ; Johnson, Alan T.; (San Diego,
CA) ; Wang, Liming; (Irvine, CA) ;
Chandraratna, Roshantha A.; (Laguna Hills, CA) |
Correspondence
Address: |
Gabor L. Szekeres
Suite 112
8141 East Kaiser Blvd.
Anaheim Hills
CA
92808
US
|
Family ID: |
24613339 |
Appl. No.: |
10/364225 |
Filed: |
February 11, 2003 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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10364225 |
Feb 11, 2003 |
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10079993 |
Feb 21, 2002 |
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10079993 |
Feb 21, 2002 |
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09651564 |
Aug 29, 2000 |
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6380256 |
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Current U.S.
Class: |
514/150 ;
514/341; 514/397; 514/400; 534/770; 534/778; 546/272.7; 548/315.1;
548/315.4 |
Current CPC
Class: |
C07C 65/28 20130101;
C07C 59/64 20130101; C07C 59/72 20130101 |
Class at
Publication: |
514/150 ;
514/400; 514/341; 514/397; 534/770; 534/778; 546/272.7; 548/315.1;
548/315.4 |
International
Class: |
A61K 031/655; A61K
031/4439; A61K 031/4178; A61K 031/4172; C07D 43/02; C07D 45/02;
C07D 49/02 |
Claims
What is claimed is:
1. A compound of the formula 50wherein A is a phenyl or naphthyl
group, or heteroaryl selected from a group consisting of pyridyl,
thienyl, furyl, pyridazinyl, pyrimidinyl, pyrazinyl, thiazolyl,
oxazolyl, imidazolyl and pyrrazolyl, said phenyl and heteroaryl
groups being optionally substituted with one or two R.sub.2 groups;
X.sub.1 is 1-imidazolyl, or lower alkyl or halogen substituted
1-imidazolyl, OR, SR, NRR.sub.6 where R is H, alkyl of 1 to 6
carbons or benzyl; Y is H, alkyl of 1 to 10 carbons, benzyl, lower
alkyl or halogen substituted benzyl, fluoro-substituted alkyl of 1
to 10 carbons, cycloalkyl of 3 to 6 carbons, lower alkyl
substituted cycloalkyl of 3 to 6 carbons, Cl, Br, or I; Z is
--C.ident.C--, (CR.sub.1.dbd.CR.sub.1).sub.n' where n' is an
integer having the value 1-5, --CO--NR.sub.1--, NR.sub.1--CO--,
--CO--O--, --O--CO--, --CS--NR.sub.1--, NR.sub.1--CS--, --CO--S--,
--S--CO--, --N.dbd.N--; R.sub.1 is independently H or alkyl of 1 to
6 carbons; R.sub.2 is independently H, alkyl of 1 to 6 carbons, F,
Cl, Br, I, fluoro substituted alkyl of 1 to 6 carbons, alkoxy of 1
to 6 carbons, or alkylthio of 1 to 6 carbons; R.sub.3 is
independently alkyl of 1 to 6 carbons, F, Cl, Br, I, fluoro
substituted alkyl of 1 to 6 carbons, OH, SH, alkoxy of 1 to 6
carbons, alkylthio of 1 to 6 carbons or benzyl; m is an integer
having the values 0 to 2; R.sub.4 is independently H, alkyl of 1 to
6 carbons, or F; fluoro-substituted alkyl of 1 to 6 carbons, or
halogen; o is an integer having the values of 0 to 4; R.sub.6 is H,
lower alkyl, cycloalkyl of 3 to 6 carbons, lower alkyl substituted
cycloalkyl of 3 to 6 carbons; n is an integer having the values of
0 to 4, and R.sub.8 is H. alkyl of 1 to 6 carbons,
--CH.sub.2O(C.sub.1-6-alkyl), or a cation of a pharmaceutically
acceptable base, with the proviso that when Y is H, A is phenyl and
Xi is OH then n is 1 to 4.
2. A compound in accordance with claim 1 where A is phenyl,
naphthyl, pyridyl, thienyl or furyl.
3. A compound in accordance with claim 1 where n is 0, 1 or 2.
4. A compound in accordance with claim 1 where Z is --C.ident.C--,
--CO--NR.sub.1--, --CO--O--, or --(CR.sub.1.dbd.CR.sub.1).sub.n'
where n' is 1.
5. A compound in accordance with claim 1 where the Z group is
attached to the 6-position of the bicyclic moiety.
6. A compound in accordance with claim 1 where X.sub.1 is
1-imidazolyl, halogen or C.sub.1-6 substituted 1-imidazolyl, or
NRR.sub.6, where R.sub.6 is preferably cyclopropyl or
branched-chain alkyl of 1 to 6 carbons.
7. A compound in accordance with claim 1 where Y is H, lower alkyl
of 1 to 3 carbons, cycloalkyl, lower alkyl substituted cycloalkyl,
or halogen.
8. A compound of the formula 51wherein X.sub.1 is 1-imidazolyl, or
dialkyl-N or alkyl,cyclopropyl-N where the alkyl group has 1 to 6
carbons; R.sub.2 is H or halogen; n is 0 or 1, and R.sub.8 is H,
alkyl of 1 to 6 carbons, or a cation of a pharmaceutically
acceptable base.
9. A compound in accordance with claim 8 where X.sub.1 is
methyl,cyclopropyl-N and n is 0.
10. A compound in accordance with claim 9 which is selected from
the group consisting of
4-[(5-cyclopropyl-methyl-amino)-8,8-dimethyl-5,6,7,8-tetrah-
ydro-naphthalene-2yl-ethynyl]-benzoic acid and
4-[5-(cyclopropyl-methyl-am-
ino)-8,8-dimethyl-5,6,7,8-tetrahydro-naphthalene-2-yl-ethynyl]-2-fluoro
benzoic acid or a salt with a pharmaceutically acceptable base or a
C.sub.1-6 alkyl ester of said compound.
11. A compound in accordance with claim 9 where X.sub.1 is
methyl,cyclopropyl-N and n is 1.
12. A compound in accordance with claim 11 which is selected from
the group consisting of
4-[(5-(cyclopropyl-methyl-amino)-8,8-dimethyl-5,6,7,8-
-tetrahydro-naphthalene-2-yl-ethynyl)-phenyl]-acetic acid and
[4-(5-(cyclopropyl-methyl-amino)-8,8-dimethyl-5,6,7,8-tetrahydro-naphthal-
ene-2-4yl-ethynyl)-2-fluoro-phenyl]-acetic acid or a salt with a
pharmaceutically acceptable base or a C.sub.1-6 alkyl ester of said
compound.
13. A compound in accordance with claim 8 where X.sub.1 is
methyl,iso-propyl-N.
14. A compound in accordance with claim 13 which is
4-[5-(iso-propyl-methyl-amino)-8,8-dimethyl-5,6,7,8-tetrahydro-naphthalen-
e-2-yl-ethynyl)]-benzoic acid or a salt with a pharmaceutically
acceptable base or a C.sub.1-6 alkyl ester of said compound.
15. A compound in accordance with claim 8 where X.sub.1 is
1-imidazolyl and n is 0.
16. A compound in accordance with claim 15 which is
[4-(5-imidazol-1-yl-8,8-dimethyl-5,6,7,8-tetrahydro-naphthalen-2-yl-ethyn-
yl)-benzoic acid or a salt with a pharmaceutically acceptable base
or a C.sub.1-6 alkyl ester of said compound.
17. A compound in accordance with claim 8 where X.sub.1 is
1-imidazolyl and n is 1.
18. A compound in accordance with claim 17 which is
[4-(5-imidazol-1-yl-8,8-dimethyl-5,6,7,8-tetrahydro-naphthalen-2-yl-ethyn-
yl)-phenyl]-acetic acid or a salt with a pharmaceutically
acceptable base or a C.sub.1-6 alkyl ester of said compound.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention is directed to novel compounds which
inhibit the enzyme cytochrome P450RAI. More particularly, the:
present invention is directed to compounds many of which are
derivatives of phenylacetic or heteroarylacetic acid, and which
inhibit the enzyme cytochrome P450RAI. Several compounds of the
invention that have an inhibitory effect on the enzyme cytochrome
P450RAI include a cyclopropyl aryl, cyclopropyl heteroaryl,
cyclopropylaminoaryl, or (1-imidazolyl) methylaryl structure.
BACKGROUND ART
[0003] Compounds which have retinoid-like activity are well known
in the art, and are described in numerous United States and other
patents and in scientific publications. It is generally known and
accepted in the art that retinoid-like activity is useful for
treating animals of the mammalian species, including humans, for
curing or alleviating the symptoms and conditions of numerous
diseases and conditions. In other words, it is generally accepted,
in the art that pharmaceutical compositions having a retinoid-like
compound or compounds as the active ingredient are useful as
regulators of cell proliferation and differentiation, and
particularly as agents for treating skin-related diseases,
including, actinic keratoses, arsenic keratoses, inflammatory and
non-inflammatory acne, psoriasis, ichthyoses and other
keratinization and hyperproliferative disorders of the skin,
eczema, topic dermatitis, Darriers disease, lichen planus,
prevention and reversal of glucocorticoid damage (steroid atrophy),
as a topical anti-microbial, as skin anti-pigmentation agents and
to treat and reverse the effects of age and photo damage to the
skin. Retinoid compounds are also useful for the prevention and
treatment of cancerous and precancerous conditions, including,
premalignant and malignant hyperproliferative diseases such as
cancers of the breast, skin, prostate, cervix, uterus, colon,
bladder, esophagus, stomach, lung, larynx, oral cavity, blood and
lymphatic system, metaplasias, dysplasias, neoplasias, leukoplakias
and papillomas of the mucous membranes and in the treatment of
Kaposi's sarcoma. In addition, retinoid compounds can be used as
agents to treat diseases of the eye, including, without limitation,
proliferative vitreoretinopathy (PVR), retinal detachment, dry eye
and other corneopathies, as well as in the treatment and prevention
of various cardiovascular diseases, including, without limitation,
diseases associated with lipid metabolism such as dyslipidemias,
prevention of post-angioplasty restenosis and as an agent to
increase the level of circulating tissue plasminogen activator
(TPA). Other uses for retinoid compounds include the prevention and
treatment of conditions and diseases associated with human
papilloma virus (HPV), including warts and genital warts, various
inflammatory diseases such as pulmonary fibrosis, ileitis, colitis
and Krohn's disease, neurodegenerative diseases such as Alzheimer's
disease, Parkinson's disease and stroke, improper pituitary
function, including insufficient production of growth hormone,
modulation of apoptosis, including both the induction of apoptosis
and inhibition of T-Cell activated apoptosis, restoration of hair
growth, including combination therapies with the present compounds
and other agents such as Minoxidil.RTM., diseases associated with
the immune system, including use of the present compounds as
immunosuppressants and immunostimulants, modulation of organ
transplant rejection and facilitation of wound healing, including
modulation of chelosis. Retinoid compounds have relatively recently
been also discovered to be useful for treating type II non-insulin
dependent diabetes mellitus (NIDDM).
[0004] Several compounds having retinoid-like activity are actually
marketed under appropriate regulatory approvals in the United
States of America and elsewhere as medicaments for the treatment of
several diseases responsive to treatment with retinoids. Retinoic
acid (RA) itself is a natural product, biosynthesized and present
in a multitude of human and mammalian tissues and is known to play
an important rule in the regulation of gene expression, tissue
differentiation and other important biological processes in mammals
including humans. Relatively recently it has been discovered that a
catabolic pathway in mammals, including humans, of natural retinoic
acid includes a step of hydroxylation of RA catalyzed by the enzyme
Cytochrome P450RAI (retinoic acid inducible).
[0005] Several inhibitors of CP450RAI have been synthesized or
discovered in the prior art, among the most important ones
ketoconazole, liarozole and R116010 are mentioned. The chemical
structures of these prior art compounds are provided below. It has
also been noted in the prior art, that administration to mammals,
including humans, of certain inhibitors of CP-450RAI results in
significant increase in endogeneous RA levels, and further that
treatment with CP450RAI inhibitors, for example with liarozole,
gives rise to effects similar to treatment by retinoids, for
example amelioration of psoriasis. 2
[0006] The following publications describe or relate to the
above-summarized role of CP450RAI in the natural catabolism of RA,
to inhibitors of CP-450RAI and to in vitro and in vivo experiments
which demonstrate that inhibition of CP450RAI activity results in a
increases endogeneous RA levels and potential therapeutic
benefits:
[0007] Kuijpers, et al., "The effects of oral liarozole on
epidermal proliferation and differentiation in severe plaque
psoriasis are comparable with those of acitretin", British Journal
of Dermatology, (1998) 139: pp 380-389.
[0008] Kang, et al., "Liarozole Inhibits Human Epidermal Retinoid
Acid 4-Hydroxylase Activity and Differentially Augments Human Skin
Responses to Retinoic Acid and Retinol In Vivo", The Journal of
Investigative Dermatology, (August 1996) Vol. 107, No. 2: pp
183-187.
[0009] Van Wauwe, et al., "Liarozole, an Inhibitor of Retinoic Acid
Metabolism, Exerts Retinoid-Mimetic Effects in Vivo", The Journal
of Pharmacology and Experimental Therapeutics, (1992) Vol. 261, No
2: pp 773-779.
[0010] De Porre, et al., "Second Generation Retinoic Acid
Metabolism Blocking Agent (Ramba) R116010: Dose Finding in Healthy
Male Volunteers", University of Leuven, Belgium, pp 30.
[0011] Wauwe, et al., "Ketoconazole Inhibits the in Vitro and in
Vivo Metabolism of All-Trans-Retinoic Acid", The Journal of
Pharmacology and Experimental Therapeutics, (1988) Vol. 245, No. 2:
pp 718-722.
[0012] White, et al., "cDNA Cloning of Human Retinoic
Acid-metabolizing Enzyme (hP450RAI) Identifies a Novel Family of
Cytochromes P450 (CYP26)*", The Journal of Biological Chemistry,
(1997) Vol. 272, No. 30, Issue of July 25 pp 18538-18541.
[0013] Hanzlik, et al., "Cyclopropylamines as Suicide Substrates
for Cytochromes P450RAI", Journal of Medicinal Chemistry (1979),
Vol. 22, No. 7, pp 759-761.
[0014] Ortiz de Montellano, "Topics in Biology--The Inactivation of
Cytochrome P450RAI", Annual Reports in Medicinal Chemistry, (1984),
Chapter 20, pp 201-210.
[0015] Hanzlik, et al. "Suicidal Inactivation of Cytochrome P450RAI
by Cyclopropylamines>Evidence for Cation-Radical Intermediates",
J. Am. Chem. Soc., (1982), Vol. 104, No. 107, pp. 2048-2052.
[0016] The present invention provides several new chemical
compounds which act as inhibitors of CP450RAI, and as such
potentially provide therapeutic benefit in the treatment or
prevention of the diseases and conditions which respond to
treatment by retinoids and or which in healthy mammals, including
humans, are controlled by natural retinoic acid. The perceived mode
of action of these compounds is that by inhibiting the enzyme
CP450RAI that catabolyzes natural RA, endogenous RA level is
elevated to a level where desired therapeutic benefits are
attained. The chemical structures of the compounds of the invention
and of compounds with similar biological activity are summarized by
Formulas 1 through 8 which are provided in the Summary Section of
this application for patent. Based on these chemical structures the
following art is of interest as background to the novel
structures.
[0017] U.S. Pat. Nos. 5,965,606; 5,773,594; 5,675,024; 5,663,347;
5,023,341; 5,264,578; 5,089,509; 5,149,705; 5,130,335; 4,740,519;
4,826,969; 4,833,240; 5,037,825; 5,466,861; 5,559,248; WO 85/00806;
WO 92/06948; WO 95/04036; WO 96/05165; EP 0 098 591; EP 0 170 105;
EP 0 176 034;EP 0 253,302;EP 0 303 915;EP 0 514 269;EP 0 617 020;
EP 0 619 116; EP 0 661 259; DE 3316932; DE 3602473; DE 3715955; UK
application GB 2190378; Eyrolles et al, J. Med. Chem., (1994), 37,
1508-1517; Graupner et al. Biochem. and Biophysical Research
Communications, (1991), 1554-1561; Kagechika, et al., J. Med.
Chem., (1988), 31, 2182-2192; Dawson, et al. "Chemistry and Biology
of Synthetic Retinoids", published by CRC Press, Inc., (1990),
pages 324-356; are of interest to compounds of Formula 4.
SUMMARY OF THE INVENTION
[0018] The present invention relates to compounds of Formula 4. The
remaining formulas in this Summary section are of compounds having
the same or similar biological activity. Those compounds are
disclosed herein because their preparation involves synthetic
routes which are illustrative of synthetic methodology that can be
used for the synthesis of the compounds of Formula 4 as well.
[0019] Compounds of Formula 1 are disclosed 3
[0020] wherein A is a phenyl or naphthyl group, or heteroaryl
selected from a group consisting of pyridyl, thienyl, furyl,
pyridazinyl, pyrimidinyl, pyrazinyl, thiazolyl, oxazolyl,
imidazolyl and pyrrazolyl, said phenyl and heteroaryl groups being
optionally substituted with one or two R.sub.2 groups;
[0021] X is O, S or NR where R is H, alkyl of 1 to 6 carbons or
benzyl;
[0022] Y is H, alkyl of 1 to 10 carbons, benzyl, lower alkyl or
halogen substituted benzyl, fluoro-substituted alkyl of 1 to 10
carbons, cycloalkyl of 3 to 6 carbons, lower alkyl substituted
cycloalkyl of 3 to 6 carbons, Cl, Br, or I;
[0023] Z is --C.ident.C--,
[0024] --(CR.sub.1.dbd.CR.sub.1).sub.n', where n' is an integer
having the value 1-5,
[0025] --CO--NR.sub.1--,
[0026] NR.sub.1--CO--;
[0027] --CO--O--,
[0028] --O--CO--,
[0029] --CS--NR.sub.1--,
[0030] NR.sub.1--CS--,
[0031] --CO--S--,
[0032] --S--CO--,
[0033] --N.dbd.N--;
[0034] R.sub.1 is independently H or alkyl of 1 to 6 carbons;
[0035] p is an integer having the values of 0 to 4;
[0036] R.sub.2 is independently H, alkyl of 1 to 6 carbons, F, Cl,
Br, I, CF.sub.3, fluoro substituted alkyl of 1 to 6 carbons, alkoxy
of 1 to 6 carbons, or alkylthio of 1 to 6 carbons;
[0037] R.sub.3 is independently alkyl of 1 to 6 carbons, F, Cl, Br,
I, fluoro substituted alkyl of 1 to 6 carbons, OH, SH, alkoxy of 1
to 6 carbons, alkylthio of 1 to 6 carbons or benzyl;
[0038] m is an integer having the values 0 to 2;
[0039] R.sub.4 is independently H, alkyl of 1 to 6 carbons, or F;
fluoro-substituted alkyl of 1 to 6 carbons, or halogen;
[0040] o is an integer having the values of 0 to 2;
[0041] n is an integer having the values of 0 to 4, and
[0042] R.sub.8 is H, alkyl of 1 to 6 carbons,
--CH.sub.2O(C.sub.1-6-alkyl)- , or a cation of a pharmaceutically
acceptable base.
[0043] Compounds of Formula 2 are disclosed 4
[0044] wherein A is a phenyl or naphthyl group, or heteroaryl
selected from a group consisting of pyridyl, thienyl, furyl,
pyridazinyl, pyrimidinyl, pyrazinyl, thiazolyl, oxazolyl,
imidazolyl and pyrrazolyl, said phenyl and heteroaryl groups being
optionally substituted with one or two R.sub.2 groups;
[0045] X is O, S or NR where R is H alkyl of 1 to 6 carbons or
benzyl;
[0046] Z is --C.ident.C--,
[0047] --(CR.sub.1.dbd.CR.sub.1).sub.n' where n' is an integer
having the value 1-5,
[0048] --CO--NR.sub.1--,
[0049] NR.sub.1--CO--,
[0050] --CO--O--,
[0051] --O--CO--,
[0052] --CS--NR.sub.1--,
[0053] NR.sub.1--CS--,
[0054] --CO--S--,
[0055] --S--CO--,
[0056] --N.dbd.N--;
[0057] R.sub.1 is independently H or alkyl of 1 to 6 carbons;
[0058] p is an integer having the values of 0 to 4;
[0059] R.sub.2 is independently H, alkyl of 1 to 6 carbons, F, Cl,
Br, I, fluoro substituted alkyl of 1 to 6 carbons, alkoxy of 1 to 6
carbons, or alkylthio of 1 to 6 carbons;
[0060] R.sub.3 is independently alkyl of 1 to 6 carbons, F, Cl, Br,
I, fluoro substituted alkyl of 1 to 6 carbons, OH, SH, alkoxy of 1
to 6 carbons, alkylthio of 1 to 6 carbons or benzyl;
[0061] m is an integer having the values 0 to 4;
[0062] R.sub.5 is H, alkyl of 1 to 6 carbons, fluorosubstituted
alkyl of 1 to 6 carbons, benzyl, or lower alkyl or halogen
substituted benzyl;
[0063] n is an integer having the values of 0 to 4, and
[0064] R.sub.8 is H, alkyl of 1 to 6 carbons,
--CH.sub.2O(C.sub.1-6-alkyl)- , or a cation of a pharmaceutically
acceptable base.
[0065] Compounds of Formula 3 are disclosed 5
[0066] wherein A is a phenyl or naphthyl group, or heteroaryl
selected from a group consisting of pyridyl, thienyl, furyl,
pyridazinyl, pyrimidinyl, pyrazinyl, thiazolyl, oxazolyl,
imidazolyl and pyrrazolyl, said phenyl and heteroaryl groups being
optionally substituted with one or two R.sub.2 groups;
[0067] Y is H, alkyl of 1 to 10 carbons, benzyl, lower alkyl or
halogen substituted benzyl, fluoro-substituted alkyl of 1 to 10
carbons, cycloalkyl of 3 to 6 carbons, lower alkyl substituted
cycloalkyl of 1 to 6 carbons, Cl, Br, or I;
[0068] Z is --C.ident.C--,
[0069] --(CR.sub.1.dbd.CR.sub.1).sub.n' where n' is an integer
having the value 1-5,
[0070] --CO--NR.sub.1--,
[0071] NR.sub.1--CO--,
[0072] --CO--O--,
[0073] --O--CO--,
[0074] --CS--NR.sub.1--,
[0075] NR.sub.1--CS--,
[0076] --CO--S--,
[0077] --S--CO--,
[0078] --N.dbd.N--;
[0079] R.sub.1 is independently H or alkyl of 1 to 6 carbons;
[0080] p is an integer having the values of 0 to 5;
[0081] R.sub.2 is independently H, alkyl of 1 to 6 carbons, F, Cl,
Br, I, fluoro substituted alkyl of 1 to 6 carbons, alkoxy of 1 to 6
carbons, or alkylthio of 1 to 6 carbons;
[0082] R.sub.3 is independently alkyl of 1 to 6 carbons, F, Cl, Br,
I, fluoro substituted alkyl of 1 to 6 carbons, OH, SH, alkoxy of 1
to 6 carbons, alkylthio of 1 to 6 carbons or benzyl;
[0083] m is an integer having the values 0 to 2;
[0084] R.sub.4 is independently H, alkyl of 1 to 6 carbons, or F;
fluoro-substituted alkyl of 1 to 6 carbons, or halogen;
[0085] o is an integer having the values of 0 to 4;
[0086] n is an integer having the values of 0 to 4, and
[0087] R.sub.8 is H, alkyl of 1 to 6 carbons,
--CH.sub.2O(C.sub.1-6-alkyl)- , or a cation of a pharmaceutically
acceptable base.
[0088] The present invention relates to compounds of Formula 4
6
[0089] wherein A is a phenyl or naphthyl group, or heteroaryl
selected from a group consisting of pyridyl, thienyl, furyl,
pyridazinyl, pyrimidinyl, pyrazinyl, thiazolyl, oxazolyl,
imidazolyl and pyrrazolyl, said phenyl and heteroaryl groups being
optionally substituted with one or two R.sub.2 groups;
[0090] X.sub.1 is 1-imidazolyl, or lower alkyl or halogen
substituted 1-imidazolyl, OR, SR, NRR.sub.6 where R is H, alkyl of
1 to 6 carbons or benzyl;
[0091] Y is H, alkyl of 1 to 10 carbons, benzyl, lower alkyl or
halogen substituted benzyl, fluoro-substituted alkyl of 1 to 10
carbons, cycloalkyl of 3 to 6 carbons, lower alkyl substituted
cycloalkyl of 3 to 6 carbons, Cl, Br, or I;
[0092] Z is --C.ident.C--,
[0093] --(CR.sub.1.dbd.CR.sub.1).sub.n' where n' is an integer
having the value 1-5,
[0094] --CO--NR.sub.1--,
[0095] NR.sub.1--CO--,
[0096] --CO--O--,
[0097] --O--CO--,
[0098] --CS--NR.sub.1--,
[0099] NR.sub.1--CS--,
[0100] --CO--S--,
[0101] --S--CO--,
[0102] --N.dbd.N--;
[0103] R.sub.1 is independently H or alkyl of 1 to 6 carbons;
[0104] R.sub.2 is independently H, alkyl of 1 to 6 carbons, F, Cl,
Br, I, fluoro substituted alkyl of 1 to 6 carbons, alkoxy of 1 to 6
carbons, or alkylthio of 1 to 6 carbons;
[0105] R.sub.3 is independently alkyl of 1 to 6 carbons, F, Cl, Br,
I, fluoro substituted alkyl of 1 to 6 carbons, OH, SH, alkoxy of 1
to 6 carbons, alkylthio of 1 to 6 carbons or benzyl;
[0106] m is an integer having the values 0 to 2;
[0107] R.sub.4 is independently H, alkyl of 1 to 6 carbons, or F;
fluoro-substituted alkyl of 1 to 6 carbons, or halogen;
[0108] o is an integer having the values of 0 to 4;
[0109] R.sub.6 is H, lower alkyl, cycloalkyl of 3 to 6 carbons,
lower alkyl substituted cycloalkyl of 3 to 6 carbons;
[0110] n is an integer having the values of 0 to 4, and
[0111] R.sub.8 is H, alkyl of 1 to 6 carbons,
--CH.sub.2O(C.sub.1-6-alkyl)- , or a cation of a pharmaceutically
acceptable base, with the proviso that when Y is H, A is phenyl and
X.sub.1 is OH then n is 1 to 4.
[0112] Compounds of Formula 5 are disclosed 7
[0113] wherein A is a phenyl or naphthyl group, or heteroaryl
selected from a group consisting of pyridyl, thienyl, furyl,
pyridazinyl, pyrimidinyl, pyrazinyl, thiazolyl, oxazolyl,
imidazolyl and pyrrazolyl, said phenyl and heteroaryl groups being
optionally substituted with one or two R.sub.2 groups;
[0114] X is O, S or NR where R is H, alkyl of 1 to 6 carbons,
C.sub.1-6-trialkylsilyl or benzyl;
[0115] Y is H, alkyl of 1 to 10 carbons, benzyl, lower alkyl or
halogen substituted benzyl, fluoro-substituted alkyl of 1 to 10
carbons, cycloalkyl of 3 to 6 carbons, lower alkyl substituted
cycloalkyl of 3 to 6 carbons, Cl, Br, or I;
[0116] Z is --C.ident.C--,
[0117] (CR.sub.1.dbd.CR.sub.1).sub.n' where n' is an integer having
the value 1-5,
[0118] --CO--NR.sub.1--,
[0119] NR.sub.1--CO--,
[0120] --CO--O--,
[0121] --O--CO--,
[0122] --CS--NR.sub.1--,
[0123] NR.sub.1--CS--,
[0124] --CO--S--,
[0125] --S--CO--,
[0126] --N.dbd.N--;
[0127] R.sub.1 is independently H or alkyl of 1 to 6 carbons;
[0128] R.sub.2 is independently H, alkyl of 1 to 6 carbons, F, Cl,
Br, I, fluoro substituted alkyl of 1 to 6 carbons, alkoxy of 1 to 6
carbons, or alkylthio of 1 to 6 carbons;
[0129] R.sub.3 is independently alkyl of 1 to 6 carbons, F, Cl, Br,
I, fluoro substituted alkyl of 1 to 6 carbons, OH, SH, alkoxy of 1
to 6 carbons, alkylthio of 1 to 6 carbons or benzyl;
[0130] m is an integer having the values 0 to 3;
[0131] R.sub.7 is H, alkyl of 1 to 6 carbons, cycloalkyl of 3 to 6
carbons or lower alkyl substituted cycloalkyl of 1 to 6
carbons;
[0132] n is an integer having the values of 1 to 4, and
[0133] R.sub.8 is H, alkyl of 1 to 6 carbons,
--CH.sub.2O(C.sub.1-6-alkyl)- , or a cation of a pharmaceutically
acceptable base.
[0134] Compounds of Formula 6 are disclosed 8
[0135] wherein A is a phenyl or naphthyl group, or heteroaryl
selected from a group consisting of pyridyl, thienyl, furyl,
pyridazinyl, pyrimidinyl, pyrazinyl, thiazolyl, oxazolyl,
imidazolyl and pyrrazolyl, said phenyl and heteroaryl groups being
optionally substituted with one or two R.sub.2 groups;
[0136] X.sub.2 is 1-imidazolyl, lower alkyl or halogen substituted
1-imidazolyl, OR.sub.7, SR.sub.7 or NRR.sub.7 where R is H, alkyl
of 1 to 6 carbons or benzyl;
[0137] Y is H, alkyl of 1 to 10 carbons, benzyl, lower alkyl or
halogen substituted benzyl, fluoro-substituted alkyl of 1 to 10
carbons, cycloalkyl of 3 to 6 carbons, lower alkyl substituted
cycloalkyl of 3 to 6 carbons, Cl, Br, or I;
[0138] Z is --C.ident.C--,
[0139] (CR.sub.1.dbd.CR.sub.1).sub.n' where n' is an integer having
the value 1-5,
[0140] --CO--NR.sub.1--,
[0141] NR.sub.1--CO--,
[0142] --CO--O--,
[0143] --O--CO--,
[0144] --CS--NR.sub.1--,
[0145] NR.sub.1--CS--,
[0146] --CO--S--,
[0147] --S--CO--,
[0148] --N.dbd.N--;
[0149] R.sub.1 is independently H or alkyl of 1 to 6 carbons;
[0150] R.sub.2 is independently H, alkyl of 1 to 6 carbons, F, Cl,
Br, I, fluoro substituted alkyl of 1 to 6 carbons, alkoxy of 1 to 6
carbons, or alkylthio of 1 to 6 carbons;
[0151] R.sub.3 is independently alkyl of 1 to 6 carbons, F, Cl, Br,
I, fluoro substituted alkyl of 1 to 6 carbons, OH, SH, alkoxy of 1
to 6 carbons, alkylthio of 1 to 6 carbons or benzyl;
[0152] m is an integer having the values 0 to 3;
[0153] R.sub.7 is H, alkyl of 1 to 6 carbons, cycloalkyl of 3 to 6
carbons, lower alkyl substituted cycloalkyl of 3 to 6 carbons or
C.sub.1-6-trialkylsilyl.
[0154] n is an integer having the values of 0 to 4, and
[0155] R.sub.8 is H, alkyl of 1 to 6 carbons,
--CH.sub.2O(C.sub.1-6-alkyl)- , or a cation of a pharmaceutically
acceptable base.
[0156] Compounds of Formula 7 are disclosed 9
[0157] wherein A is a phenyl or naphthyl group, or heteroaryl
selected from a group consisting of pyridyl, thienyl, furyl,
pyridazinyl, pyrimidinyl, pyrazinyl, thiazolyl, oxazolyl,
imidazolyl and pyrrazolyl, said phenyl and heteroaryl groups being
optionally substituted with one or two R.sub.2 groups;
[0158] Y is H, alkyl of 1 to 10 carbons, benzyl, lower alkyl or
halogen substituted benzyl, fluoro-substituted alkyl of 1 to 10
carbons, cycloalkyl of 3 to 6 carbons, lower alkyl substituted
cycloalkyl of 3 to 6 carbons, F, Cl, Br, or I;
[0159] Z is --C.ident.C--,
[0160] (CR.sub.1.dbd.CR.sub.1).sub.n' where n' is an integer having
the value 1-5,
[0161] --CO--NR.sub.1--,
[0162] NR.sub.1--CO--,
[0163] --CO--O--,
[0164] --O--CO--,
[0165] --CS--NR.sub.1--,
[0166] NR.sub.1--CS--,
[0167] --CO--S--,
[0168] --S--CO--,
[0169] --N.dbd.N--;
[0170] R.sub.1 is independently H or alkyl of 1 to 6 carbons;
[0171] p is an integer having the values of 0 to 5;
[0172] R.sub.2 is independently H, alkyl of 1 to 6 carbons, F, Cl,
Br, I, CF.sub.3, fluoro substituted alkyl of 1 to 6 carbons, alkoxy
of 1 to 6 carbons, or alkylthio of 1 to 6 carbons;
[0173] R.sub.3 is independently alkyl of 1 to 6 carbons, F, Cl, Br,
I, CF.sub.3, fluoro substituted alkyl of 1 to 6 carbons, OH, SH,
alkoxy of 1 to 6 carbons, alkylthio of 1 to 6 carbons or
benzyl;
[0174] m is an integer having the values 0 to 2;
[0175] R.sub.4 is independently H, alkyl of 1 to 6 carbons, or F;
fluoro-substituted alkyl of 1 to 6 carbons, or halogen;
[0176] o is an integer having the values of 0 to 4;
[0177] n is an integer having the values of 0 to 4, and
[0178] R.sub.8 is H, alkyl of 1 to 6 carbons,
--CH.sub.2O(C.sub.1-6-alkyl)- , or a cation of a pharmaceutically
acceptable base.
[0179] Compounds of Formula 8 are disclosed 10
[0180] wherein A is a phenyl or naphthyl group, or heteroaryl
selected from a group consisting of pyridyl, thienyl, furyl,
pyridazinyl, pyrimidinyl, pyrazinyl, thiazolyl, oxazolyl,
imidazolyl and pyrrazolyl, said phenyl and heteroaryl groups being
optionally substituted with one or two R.sub.2 groups;
[0181] X.sub.3 is S, or O, C(R.sub.1).sub.2, or CO;
[0182] Y.sub.1 is H, lower alkyl of 1 to 6 carbons, cycloalkyl of 3
to 6 carbons, benzyl, lower alkyl substituted cycloalkyl of 3 to 6
carbons;
[0183] Z is --C.ident.C--,
[0184] --(CR.sub.1.dbd.CR.sub.1).sub.n' where n' is an integer
having the value 1-5,
[0185] --CO--NR.sub.1--,
[0186] NR.sub.1--CO--,
[0187] --CO--O--,
[0188] --O--CO--,
[0189] --CS--NR.sub.1--,
[0190] NR.sub.1--CS--,
[0191] --CO--S--,
[0192] --S--CO--,
[0193] --N.dbd.N--;
[0194] R.sub.1 is independently H or alkyl of 1 to 6 carbons;
[0195] R.sub.2 is independently H, alkyl of 1 to 6 carbons, F, Cl,
Br, I, CF.sub.3, fluoro substituted alkyl of 1 to 6 carbons, alkoxy
of 1 to 6 carbons, or alkylthio of 1 to 6 carbons;
[0196] R.sub.3 is independently alkyl of 1 to 6 carbons, F, Cl, Br,
I, CF.sub.3, fluoro substituted alkyl of 1 to 6 carbons, OH, SH,
alkoxy of 1 to 6 carbons, alkylthio of 1 to 6 carbons or
benzyl;
[0197] m is an integer having the values 0 to 2;
[0198] R.sub.4 is independently H, alkyl of 1 to 6 carbons, or F;
fluoro-substituted alkyl of 1 to 6 carbons, or halogen;
[0199] o is an integer having the values of 0 to 4;
[0200] n is an integer having the values of 0 to 4, and
[0201] R.sub.8 is H, alkyl of 1 to 6 carbons,
--CH.sub.2O(C.sub.1-6-alkyl)- , or a cation of a pharmaceutically
acceptable base, the compound meeting at least one of the provisos
selected from the group consisting of:
[0202] Y.sub.1 is cycloalkyl,
[0203] when Y.sub.1 is not cycloalkyl then X.sub.3 is O or S and n
is 1,
[0204] when Y.sub.1 is not cycloalkyl then X.sub.3 is CO, and n is
1,
[0205] when Y.sub.1 is not cycloalkyl then X.sub.3 is CO and the
moiety A is substituted with at least one F group.
[0206] In a second aspect, this invention relates to the use of the
compounds of Formula 4 for the prevention or treatment of diseases
and conditions in mammals, including humans, which diseases or
conditions are prevented, treated, ameliorated, or the onset of
which is delayed by administration of retinoid compounds or by the
mammalian organism's naturally occurring retinoic acid. Because the
compounds act as inhibitors of the breakdown of retinoic acid, the
invention also relates to the use of the compounds of Formula 4 in
conjunction with retinoic acid or other retinoids. In this regard
it is noted that retionoids are useful for the treatment of
skin-related diseases, including, without limitation, actinic
keratoses, arsenic keratoses, inflammatory and non-inflammatory
acne, psoriasis, ichthyoses and other keratinization and
hyperproliferative disorders of the skin, eczema, atopic
dermatitis, Darriers disease, lichen planus, prevention and
reversal of glucocorticoid damage (steroid atrophy), as a topical
anti-microbial, as skin anti-pigmentation agents and to treat and
reverse the effects of age and photo damage to the skin. The
retinoids are also useful for the prevention and treatment of
metabolic diseases such as type II non-insulin dependent diabetes
mellitus (NIDDM) and for prevention and treatment of cancerous and
precancerous conditions, including, premalignant and malignant
hyperproliferative diseases such as cancers of the breast, skin,
prostate, cervix, uterus, colon, bladder, esophagus, stomach, lung,
larynx, oral cavity, blood and lymphatic system, metaplasias,
dysplasias, neoplasias, leukoplakias and papillomas of the mucous
membranes and in the treatment of Kaposi's sarcoma. Retinoids can
also be used as agents to treat diseases of the eye, including,
without limitation, proliferative vitreoretinopathy (PVR), retinal
detachment, dry eye and other corneopathies, as well as in the
treatment and prevention of various cardiovascular diseases,
including, without limitation, diseases associated with lipid
metabolism such as dyslipidemias, prevention of post-angioplasty
restenosis and as an agent to increase the level of circulating
tissue plasminogen activator (TPA). Other uses for retinoids
include the prevention and treatment of conditions and diseases
associated with human papilloma virus (HPV), including warts and
genital warts, various inflammatory diseases such as pulmonary
fibrosis, ileitis, colitis and Krohn's disease, neurodegenerative
diseases such as Alzheimer's disease, Parkinson's disease and
stroke, improper pituitary function, including insufficient
production of growth hormone, modulation of apoptosis, including
both the induction of apoptosis and inhibition of T-Cell activated
apoptosis, restoration of hair growth, including combination
therapies with the present compounds and other agents such as
Minoxidil.RTM., diseases associated with the immune system,
including use of the present compounds as immunosuppressants and
immunostimulants, modulation of organ transplant rejection and
facilitation of wound healing, including modulation of
chelosis.
[0207] This invention also relates to a pharmaceutical formulation
comprising one or more compounds of Formula 4 in admixture with a
pharmaceutically acceptable excipient, said formulation being
adapted for administration to a mammal, including a human being, to
treat or alleviate the conditions which were described above as
treatable by retinoids, or which are controlled by or responsive to
the organism's native retinoic acid. These formulations can also be
co-administered with retinoids to enhance or prolong the effects of
medications containing retinoids or of the organism's native
retinoic acid.
BRIEF DESCRIPTION OF THE DRAWING FIGURE
[0208] FIG. 1 is a schematic representation of the P450RAI cell
based assay utilized to evaluate the ability of the compounds of
the invention to inhibit the Cytochrome P450RAI enzyme.
BIOLOGICAL ACTIVITY, MODES OF ADMINISTRATION
[0209] P450RAI-1 Cell-Based Inhibitor Assay:
[0210] FIG. 1 shows a schematic diagram of the P450RAI-1 cell based
assay. P450RAI-1 stably transfected HeLa cells are maintained in
100 millimolar tissue culture dishes in Modified Eagle's Medium
(MEM) containing 10% Fetal Bovine Serum (FBS) and 100 .mu.g/ml
hygromycin. Exponentially growing cells are harvested by incubating
in trypsin. Cells are then washed with 1.times. Phosphate Buffered
Saline (PBS) and plated in a 48-well plate at 5.times.10.sup.5
cells in 0.2 ml MEM medium containing 10% FBS and 0.05 .mu.Ci
[.sup.3H]-RA in the presence or absence of increasing
concentrations of the test compounds. The compounds are diluted in
100% DMSO and then added in triplicate wells at either 10, 1 or 0.1
.mu.M final concentration. As a positive control for RA metabolism
inhibition, cells are also incubated with ketoconazole at 100, 10
and 1 .mu.M. Cell are incubated for 3 hours at 37.degree. C. The
retinoids are then extracted using the procedure of Bligh et al.
(1959) Canadian Journal of Biochemistry 37, 911-917, modified by
using methylenechloride instead of chloroform. The publication
Bligh et al. (1959) Canadian Journal of Biochemistry 37, 911-917 is
specifically incorporated herein by reference. The water soluble
radioactivity is quantified using a .beta.-scintillation counter.
IC.sub.50 values represent the concentration of inhibitor required
to inhibit all-trans-RA metabolism by 50 percent and are derived
manually from log-transformed data. The IC.sub.50 values obtained
in this assay for several preferred compounds of the invention are
disclosed in Table 1 below.
[0211] Assays of Retinoid-like or Retinoid Antagonist and Inverse
Agonist-like Biological Activity
[0212] Assays described below measure the ability of a compound to
bind to, and/or activate various retinoid receptor subtypes. When
in these assays a compound binds to a given receptor subtype and
activates the transcription of a reporter gene through that
subtype, then the compound is considered an agonist of that
receptor subtype. Conversely, a compound is considered an
antagonist of a given receptor subtype if in the below described
co-tranfection assays the compound does not cause significant
transcriptional activation of the receptor regulated reporter gene,
but nevertheless binds to the receptor with a K.sub.d value of less
than approximately 1 micromolar. In the below described assays the
ability of the compounds to bind to RAR.sub..alpha.,
RAR.sub..beta., RAR.sub..gamma., RXR.sub..alpha., RXR.sub..beta.
and RXR.sub..gamma. receptors, and the ability or inability of the
compounds to activate transcription of a reporter gene through
these receptor subtypes can be tested.
[0213] As far as specific assays are concerned, a chimeric receptor
transactivation assay which tests for agonist-like activity in the
RAR.sub..alpha., RAR.sub..beta., and RAR.sub..gamma., receptor
subtypes, and which is based on work published by Feigner P. L. and
Holm M (1989) Focus, 112 is described in detail in U.S. Pat. No.
5,455,265. The specification of U.S. Pat. No. 5,455,265 is hereby
expressly incorporated by reference. The numeric results obtained
with several preferred compounds of this invention in this assay
are shown below in Table 1. These data demonstrate that generally
speaking the compounds are not agonists (or only weak agonists) of
RAR retinoic receptors, and also that they do not bind, or in some
cases bind only weakly to RAR retinoid receptors.
[0214] A holoreceptor transactivation assay and a ligand binding
assay which measure the antagonist/agonist like activity of the
compounds of the invention, or their ability to bind to the several
retinoid receptor subtypes, respectively, are described in
published PCT Application No. WO WO93/11755 (particularly on pages
30-33 and 37-41) published on Jun. 24, 1993, the specification of
which is also incorporated herein by reference. A detailed
experimental procedure for holoreceptor transactivations has been
described by Heyman et al. Cell 68, 397-406, (1992); Allegretto et
al. J. Biol. Chem. 268, 26625-26633, and Mangelsdorf et al. The
Retinoids: Biology, Chemistry and Medicine, pp 319-349, Raven Press
Ltd., New York, which are expressly incorporated herein by
reference. The results obtained in this assay are expressed in
EC.sub.50 numbers, as they are also in the chimeric receptor
transactivation assay. The results of ligand binding assay are
expressed in K.sub.d numbers. (See Cheng et al. Biochemical
Pharmacology Vol. 22 pp 3099-3108, expressly incorporated herein by
reference.)
[0215] The results if the ligand binding assay for several
preferred compounds of the invention are included in Table 1. In
the holoreceptor transactivation assay, tested for RXR.sub..alpha.,
RXR.sub..beta., and RXR.sub..gamma. receptors, the compounds of the
present invention are, generally speaking, entirely devoid of
activity, demonstrating that the compounds of the invention do not
act as RXR agonists.
1TABLE 1 P450RAI INHIBITION RAR EC.sub.50/ DATA Compound General
Table (EFFICACY)/K.sub.dnM INTACT HELA # Formula #.sup.1 .alpha.
.beta. .gamma. IC.sub.50.mu.M 110 2 3 NA 74 262 >10 (44) (42)
2058 409 >10K 112 2 3 NA 335 NA >10 (37) 5853 704 685 3 4 5
280 4.8 9.8 3 (28) (54) (52) 145 0.8 158 114 2 3 NA NA NA >10
>10K >10K >10K 108 2 3 6.6 283 141 >10 (15) (36) (10)
21K 547 13K 116 2 3 NA WA NA >10 3269 732 886 77 2 3 NA WA NA
>10 2207 225 16 78 2 3 NA NA NA >10 >10K >10K >10K
40 1 2 33 1.2 6.8 1.7 (207) (126) (140) 1.7 69 1.3 363 42 1 2 NA NA
NA 0.19 15K 3636 >10K 28 8 9 NA NA NA 0.34 21K 4272 >10K 70 2
3 NA NA NA >10 >10K >10K >10K 69 2 3 313 12 52.6 >10
(10) (50) (31) >10 469 133 501 73 2 3 WA 22.5 91 >10 (39)
(24) 486 26 351 74 2 3 NA NA NA 3.5 11K 14K >10K 30 8 9 14 2.2
84 0.28 44 1 2 49 1.7 7.5 0.27 (138) (100) (116) 37 1.9 392 82 2 3
NA NA NA >10 >10K >10K >10K 81 2 3 NA 490 183 >10
(80) (67) 4210 846 1058 89 2 3 268 26 12 >10 (20) (50) (46) 3407
980 475 90 2 3 NA NA NA 0.95 >10K >10K >10K 94 2 3 NA NA
NA >10 >10K >10K >10K 93 2 3 4821 20 10 >10 (114)
(39) (55) 3450 554 358 5 8 9 NA 11 NA 0.55 (36) 9148 2815 >10K 8
4 5 NA 363 NA 0.4 (96) 10K 3781 25K 86 2 3 NA NA NA 1.4 >10K
>10K >10K 85 2 3 976 3.5 2.5 >10 (60) (77) (65) 1861 240
302 98 2 3 NA NA NA 0.8 13 4 5 NA 3.2 116 3.1 (6.6) (9) 10 8 9 57
0.3 6 0.7 (146) (86) (94) 36 8 9 13K 4896 492 0.033 38 8 9 10K 5317
2884 0.025 34 8 9 61.5 15 2.5 0.13 119 6 7 >10K >10K >10K
0.4 121 6 7 >10K >100K >100K 0.18 46 8 9 >10K >10K
>10K 2.2 20 8 9 >10 18 4 5 1.1 32 8 9 27K 4225 13K 0.18 139 4
5 0.05 22 3 4 1.6 24 3 4 3 137 4 5 0.1 26 4 5 10 127 6 7 0.4 126 6
7 0.09 48 1 2 0.03 50 1 2 0.014 52 1 2 0.05 54 1 2 0.022 62 7 8
>10 56 8 9 0.13 134 6 7 5 58 1 2 0.18 60 1 2 1.6 143 0.8 145 0.2
.sup.1The "Table #" refers to the Table provided below where the
compound is identified with reference to a corresponding specific
formula of Formulas 9 through 16.
TOPICAL SKIN IRRITATION TESTS
[0216] As is known the topical retinoid all-trans-retinoic acid
(ATRA) and oral retinoids such as 13-cis RA and etretinate are
known to induce substantial skin irritation in humans. This
irritation is a direct result of activation of the RAR nuclear
receptors. Analysis of retinoid topical irritation is also a highly
reproducible method of determining in vivo retinoid potency. The
SKH1-hrBR or hairless mouse provides a convenient animal model of
topical irritation, since retinoid-induced skin flaking and
abrasion can be readily scored by eye (Standeven et al., "Specific
antagonist of retinoid toxicity in mice." Toxicol. Appl. Pharmacol.
138:169-175, (1996); Thacher, et al., "Receptor specificity of
retinoid-induced hyperplasia. Effect of RXR-selective agonists and
correlation with topical irritation". J. Pharm. Exp. Ther.,
282:528-534, (1997)). As is demonstrated below the topical
application of P450RAI inhibitors of the present invention also
causes an increase in the endogenous levels of ATRA that results in
ATRA-induced irritation in skin of hairless mice. The attached data
table discloses the retinoid-mimetic effects of some P450RAI
inhibitor compounds of the present invention on the skin of
hairless mice.
[0217] Methods
[0218] Female hairless mice (Crl:SKH1-hrBR), 5-7 weeks old, were
obtained from Charles River Breeding Labs (Wilmington, Mass.).
Animals were about 6 weeks old at the start of the experiments.
Food (Purina Rodent Chow 5001) and reverse osmosis water were
provided ad libitum. Mice were housed individually throughout the
dosing period. In some experiments, mice that fit within a defined
weight range, e.g., 21-25 g, were selected from the available stock
and then randomly assigned to the various treatment groups, using
body weight as the randomization variable.
[0219] The compounds to be tested were dissolved in acetone for
application to the backs of the mice.
[0220] Mice were treated topically on the back in a volume of 4.0
ml/kg (0.07-0.12 ml) adjusted daily so as to deliver a fixed dose
of test compound per g body weight. Doses are disclosed as nmol/25
g.
[0221] Unless indicated otherwise, mice were treated with retinoids
once daily on days 1 through 5 and observed on days 2, 3, 4, 5, 6,
7 and 8.
[0222] The mice were weighed daily and the dorsal skin was graded
daily using separate semi-quantitative scales to determine flaking
and abrasion. These flaking and abrasion scores were combined with
weight change (if any) to create a cutaneous toxicity score
(Blackjack score).
[0223] Cutaneous Toxicity Score
[0224] A visual grading scale was used for characterizing topical
irritation on a daily basis. The grading scale used is as
follows:
2 Flaking Abrasions 0 = none 0 = none 1 = slight (small flakes,
<50% 1 = slight (one or two abrasions with coverage) a light
pink color) 2 = mild (small flakes, 50% 2 = mild (several abrasions
with a coverage) pink color) 3 = moderate (small flakes, >50% 3
= moderate (one or two deep coverage & large flakes, <25%
abrasions with red color, <25% coverage) coverage) 4 = severe
(small flakes, >50% 4 = severe (multiple deep abrasions coverage
& large flakes, 25-50% with red color, >25% coverage)
coverage) 5 = very severe (large flakes, >50% coverage)
[0225] Topical Toxicity Score
[0226] The flaking and abrasion observations were combined with
body weight observations to calculate a single, semiquantitative
topical or cutaneous "toxicity score" as detailed below. The
toxicity score (also known as "blackjack score" since the
theoretical maximum is 21) takes into account the maximal severity,
and the time of onset of skin flaking and abrasions and the extent
of weight between the first and last days of the experiment. Below
are listed the seven numerical components of the toxicity score and
an explanation of how those values are combined to calculate the
toxicity score.
[0227] 1. Flaking-Maximal Severity:
[0228] Highest flaking score attained during observation
period.
[0229] 2. Flaking-Day of Onset of grade 2 or worse:
[0230] 0.fwdarw.8 days
[0231] 1-day 8
[0232] 2-day 6 or 7
[0233] 3-day 4 or 5
[0234] 4-day 2 or 3
[0235] 3. Flaking-Average Severity:
[0236] Flaking severity scores are summed and divided by the number
of observation days.
[0237] 4. Abrasion-Maximal Severity:
[0238] Highest abrasion score attained during observation
period.
[0239] 5. Abrasion-Day of Onset of grade 2 or worse:
[0240] Same scale as (2) above.
[0241] 6. Abrasion-Average Severity:
[0242] Abrasion severity scores are summed and divided by the
number of observation days.
[0243] 7. Systemic Toxicity (weight loss):
[0244] 0.fwdarw.1 g
[0245] 1-1 to 2 g
[0246] 2-2 to 4 g
[0247] 3-4to 6 g
[0248] 4.fwdarw.6g or dead
[0249] Calculation of Composite Flaking Score
[0250] Flaking onset score (2) and average severity score (3) are
summed and divided by two. The quotient is added to the maximal
severity score (1). Composite flaking scores are calculated for
each individual animal in a group, averaged, and rounded to the
nearest integer. Values can range from 0-9.
[0251] Calculation of Composite Abrasion Score
[0252] Abrasion onset score (5) and average severity score (6) are
summed and divided by two. The quotient is added to the maximal
severity score (4). Composite abrasion scores are calculated for
each individual animal in a group, averaged and rounded to the
nearest integer. Values can range from 0-8.
[0253] Calculation of Toxicity Score
[0254] Composite flaking score, composite abrasion score, and
systemic toxicity score are summed to give the "toxicity score."
Toxicity scores are calculated for each individual animal in a
group, averaged, and rounded to the nearest integer. Values can
range from 0-21 and are expressed in Table 1A below as the mean
.+-.SD of the values for a group.
[0255] Calculation of Percentage Change in Body Weight
[0256] The body weight at the time of the last weighing (day 8, 11,
or 12) was subtracted from the initial body weight. The difference
was divided by the initial body weight, multiplied by 100%, and
rounded to the nearest integer. Values were calculated for each
individual animal and the mean and standard deviation for each
group are shown.
3 TABLE 1A Cutaneous Toxicity Score (Blackjack Score) 100 300 1000
Compound No. nmole nmole nmole 5 0 6 .+-. 3 15 1 .+-. 1 5 .+-. 2 36
1 .+-. 1 11 .+-. 0 38 1 .+-. 1 10 .+-. 1 8 5 .+-. 2 8 .+-. 3 12
.+-. 1 22 0 .+-. 0 0 .+-. 0 1 .+-. 1 137 1 .+-. 1 1 .+-. 1 5 .+-. 2
48 1 .+-. 1 3 .+-. 1 7 .+-. 2 50 1 .+-. 0 3 .+-. 2 8 .+-. 2 58 0
.+-. 0 0 .+-. 0 0 .+-. 0 131 1 .+-. 1 0 .+-. 1 1 .+-. 1 127 0 .+-.
0 0 .+-. 0 0 .+-. 0 18 0 .+-. 0 5 .+-. 2 10 .+-. 2
[0257] Modes of Administration
[0258] The compounds of this invention may be administered
systemically or topically, depending on such considerations as the
condition to be treated, need for site-specific treatment, quantity
of drug to be administered, and numerous other considerations.
Thus, in the treatment of dermatoses, it will generally be
preferred to administer the drug topically, though in certain cases
such as treatment of severe cystic acne or psoriasis, oral
administration may also be used. Any common topical formulation
such as a solution, suspension, gel, ointment, or salve and the
like may be used. Preparation of such topical formulations are well
described in the art of pharmaceutical formulations as exemplified,
for example, by Remington's Pharmaceutical Science, Edition 17,
Mack Publishing Company, Easton, Pa. For topical application, these
compounds could also be administered as a powder or spray,
particularly in aerosol form. If the drug is to be administered
systemically, it may be confected as a powder, pill, tablet or the
like or as a syrup or elixir suitable for oral administration. For
intravenous or intraperitoneal administration, the compound will be
prepared as a solution or suspension capable of being administered
by injection. In certain cases, it may be useful to formulate these
compounds by injection. In certain cases, it may be useful to
formulate these compounds in suppository form or as extended
release formulation for deposit under the skin or intramuscular
injection.
[0259] Other medicaments can be added to such topical formulation
for such secondary purposes as treating skin dryness; providing
protection against light; other medications for treating
dermatoses; medicaments for preventing infection, reducing
irritation, inflammation and the like.
[0260] Treatment of dermatoses or any other indications known or
discovered to be susceptible to treatment by retinoic acid-like
compounds, or to control by naturally occurring retinoic acid will
be effected by administration of the therapeutically effective dose
of one or more compounds of the instant invention. A therapeutic
concentration will be that concentration which effects reduction of
the particular condition, or retards its expansion. In certain
instances, the compound potentially may be used in prophylactic
manner to prevent onset of a particular condition.
[0261] A useful therapeutic or prophylactic concentration will vary
from condition to condition and in certain instances may vary with
the severity of the condition being treated and the patient's
susceptibility to treatment. Accordingly, no single concentration
will be uniformly useful, but will require modification depending
on the particularities of the disease being treated. Such
concentrations can be arrived at through routine experimentation.
However, it is anticipated that in the treatment of, for example,
acne, or similar dermatoses, that a formulation containing between
0.01 and 1.0 milligrams per milliliter of formulation will
constitute a therapeutically effective concentration for total
application. If administered systemically, an amount between 0.01
and 5 mg per kg of body weight per day would be expected to effect
a therapeutic result in the treatment of many diseases for which
these compounds are useful.
[0262] In some applications pharmaceutical formulations containing
the CP-450RAI inhibitory compounds of the invention may be
co-administered with formulations containing retinoids.
GENERAL EMBODIMENTS AND SYNTHETIC METHODOLOGY
[0263] Definitions
[0264] The term alkyl refers to and covers any and all groups which
are known as normal alkyl and branched-chain alkyl. Unless
specified otherwise, lower alkyl means the above-defined broad
definition of alkyl groups having 1 to 6 carbons in case of normal
lower alkyl, and 3 to 6 carbons for lower branch chained alkyl
groups. A pharmaceutically acceptable salt may be prepared for any
compound in this invention having a functionality capable of
forming a salt, for example an acid functionality. A
pharmaceutically acceptable salt is any salt which retains the
activity of the parent compound and does not impart any deleterious
or untoward effect on the subject to which it is administered and
in the context in which it is administered.
[0265] Pharmaceutically acceptable salts may be derived from
organic or inorganic bases. The salt may be a mono or polyvalent
ion. Of particular interest are the inorganic ions, sodium,
potassium, calcium, and magnesium. Organic salts may be made with
amines, particularly ammonium salts such as mono-, di- and trialkyl
amines or ethanol amines. Salts may also be formed with caffeine,
tromethamine and similar molecules. Where there is a nitrogen
sufficiently basic as to be capable of forming acid addition salts,
such may be formed with any inorganic or organic acids or
alkylating agent such as methyl iodide. Preferred salts are those
formed with inorganic acids such as hydrochloric acid, sulfuric
acid or phosphoric acid. Any of a number of simple organic acids
such as mono-, di- or tri-acid may also be used.
[0266] Some compounds of the present invention may have trans and
cis (E and Z) isomers. Unless specific orientation of substituents
relative to a double bond or a ring is indicated in the name of the
respective compound, and/or by specifically showing in the
structural formula the orientation of the substituents relative to
the double bond or ring the invention covers trans as well as cis
isomers.
[0267] Some of the compounds of the present invention may contain
one or more chiral centers and therefore may exist in enantiomeric
and diastereomeric forms. The scope of the present invention is
intended to cover all isomers per se, as well as mixtures of cis
and trans isomers, mixtures of diastereomers and racemic mixtures
of enantiomers (optical isomers) as well. A bond drawn with a wavy
line indicates that the carbon to which the bond is attached can be
in any of the applicable possible configurations.
[0268] General Synthetic Methodology
[0269] The compounds of the invention are encompassed by the
general Formulas 1 through 8 provided above. As it can be seen, in
each of these formulas a linker or tethering group designated Z
covalently connects an aromatic or heteroaromatic moiety designated
A(R.sub.2)--CH.sub.2).sub.n-- -COOR.sub.8 and another cyclic moiety
which in accordance with these formulas is a substituted phenyl,
substituted tetrahydronaphthalene, substituted chroman,
thiochroman, tetrahydroquinoline or tetrahydroisoquinoline moiety.
Generally speaking a compound such as
X.sub.4-A(R.sub.2)--CH.sub.2).sub.n--COOR.sub.8 is commercially
available, or can be made in accordance with the chemical
literature, or with such modification of known chemical processes
which are within the skill of the practicing organic chemist. The
group X.sub.4 represents a reactive group, which is suitable for
coupling the X.sub.4A(R.sub.2)--CH.sub.2).sub.n--COOR.sub.8
compound to a derivative of the substituted phenyl, substituted
tetrahydronaphthalene, substituted chroman, thiochroman,
tetrahydroquinoline or tetrahydroisoquinoline moiety so that as a
result of the coupling the linker or tether moiety Z is formed. In
many instances the group X.sub.4 is a leaving group such as
halogen, or trifluoromethanesulfonyloxy, or a group capable of
participating in a Wittig or Horner Emmons reaction. In some
instances the group X.sub.4 is an ethynyl group capable of
undergoing a coupling reaction with a leaving group (such as a
halogen or a trifluoromethanesulfonyloxy group) attached to the
substituted phenyl, substituted tetrahydronaphthalene, substituted
chroman, thiochroman, tetrahydroquinoline or tetrahydroisoquinoline
moiety. The group X.sub.4 can also represent an OH or an NH.sub.2
group that forms an ester (COO) or amide (CONH) linker,
respectively, when reacted with an activated carboxyl derivative of
the substituted phenyl, substituted tetrahydronaphthalene,
substituted chroman, thiochroman, tetrahydroquinoline or
tetrahydroisoquinoline moiety. Examples for the compounds of
formula X.sub.4A(R.sub.2)--CH.sub.2).sub.n--COOR.sub.8 are provided
in the specific examples below. Further examples where the X.sub.4
group is halogen are ethyl 4-iodobenzoate, ethyl 6-iodonicotinate,
ethyl 5-iodofuran-3-carboxylate, ethyl
5-iodothiophen-3-carboxylate, ethyl 5-iodofuran-2-carboxylate,
ethyl 5-iodothiophen-2-carboxylate, and analogous halogenated
derivatives of the respective pyridazine, pyrazine and other
heteroaryl carboxylic acid esters. The analogous aryl and and
heteroaryl hydroxyl compounds and amines, wherein the halogen of
the above-listed compounds is replaced by OH or NH.sub.2
respectively, also serve as additional examples for the reagents of
the formula X.sub.4-A(R.sub.2)--CH.sub.2).sub.n--COOR.sub.8. In
these examples X.sub.4 is OH or NH.sub.2, respectively.
[0270] Still further in accordance with the general synthetic
methodology to provide the compounds of the present invention, a
derivative of the substituted phenyl, substituted
tetrahydronaphthalene, substituted chroman, thiochroman,
tetrahydroquinoline or tetrahydroisoquinoline moiety is synthesized
first, having a covalently attached X.sub.5 group. The X.sub.5
group reacts with the X.sub.4 group of the reagent
X.sub.4-A(R.sub.2)--CH.sub.2.sub.n--COOR.sub.8 to form the linker
designated Z in Formulas 1 through 8. The X.sub.5 group is one that
is capable of participating in a catalyzed coupling reaction, (such
as an ethynyl group when X.sub.4 is a leaving group), or a leaving
group (such as halogen or trifluoromethanesulfonyloxy when X.sub.4
is an ethynyl group), or an activated carboxylic acid function
(when X.sub.4 is OH or NH.sub.2). The X.sub.5 group can also be an
OH, SH or NH.sub.2 group when the X.sub.4 group is an activated
carboxylic acid function. Specific examples for substituted phenyl,
substituted tetrahydronaphthalene, substituted chroman,
thiochroman, tetrahydroquinoline or tetrahydroisoquinoline
intermediates having an X.sub.5 functionality are provided below,
and are also available in the chemical scientific and patent
literature. Generally speaking, for reagents and reactions
covalently joining a substituted tetrahydronaphthalene, substituted
chroman, thiochroman, or tetrahydroquinoline intermediate with a
substituted aryl or heteroaryl group, such as
X.sub.4-A(R.sub.2)--CH.sub.- 2).sub.n--COOR.sub.8, to form a
compound including the linker designated Z, reference is made to
U.S. Pat. Nos. 5,648,503; 5,723,666 and 5,952,345 the specification
of each of which are expressly incorporated herein by
reference.
[0271] The substituted phenyl, tetrahydronaphthalene, chroman,
thiochroman, tetrahydroquinoline or tetrahydroisoquinoline moiety
of the novel compounds of the invention are derivatized in a manner
to include the specific substituents (such as for example the
cycloalkyl substituents) encompassed within the scope of the
invention, either before or after the
-A(R.sub.2)--CH.sub.2).sub.n--COOR.sub.8 moiety has been attached
and the linker Z has formed, as illustrated by the below described
specific examples.
[0272] The --CH.sub.2).sub.n--COOR.sub.8 moiety of the compounds of
the invention can be modified in order to obtain still further
compounds of the invention. One such modification is saponification
of compounds where the R.sub.8 group is an alkyl or
--CH.sub.2O(C.sub.1-6-alkyl) group. Another modification is
esterification of the carboxylic acid function when the R.sub.8
group is H or a cation. Such saponification and esterification
reactions are well known in the art and within the skill of the
practicing organic chemist. Still another modification of the
compounds of the invention (or of the intermediates
X.sub.4-A(R.sub.2)--CH.sub.2).sub.n--COOR.sub.8, or of precursors
to these intermediates) is the homologation of the (CH.sub.2).sub.n
group. The latter can be accomplished, for example, by the well
known Arndt-Eistert method of homologation, or other known methods
of homologation.
SPECIFIC EMBODIMENTS
[0273] With reference to the symbol A in Formulas 1 through 8, the
preferred compounds of the invention are those where A is phenyl,
naphthyl, pyridyl, thienyl or furyl. Even more preferred are
compounds where A is phenyl. As far as substitutions on the A
(phenyl) and A (pyridyl) groups are concerned, compounds are
preferred where the phenyl group is 1,4 (para) substituted and
where the pyridine ring is 2,5 substituted. (Substitution in the
2,5 positions in the "pyridine" nomenclature corresponds to
substitution in the 6-position in the "nicotinic acid"
nomenclature.) In the presently preferred compounds of the
invention either there is no R.sub.2 substituent on the A group, or
the R.sub.2 substituent is preferably a fluoro group that is
preferably located on the aromatic carbon adjacent (ortho) to the
carbon bearing the --(CH.sub.2.sub.n--COOR.sub.8 group.
[0274] As far as the --(CH.sub.2.sub.n--COOR.sub.8 is concerned
compounds are preferred where n is 0, 1 or 2, and even more
preferred where n is 1. In Formulas 5 and 8 only compounds where n
is 1 or 2 are preferred, with n=1 being most preferred. For the
R.sub.8 group H, lower alkyl of 1 to 3 carbons, and
--CH.sub.2O(C.sub.1-6-alkyl) groups are preferred, as well as the
pharmaceutically acceptable salts of the free acids when R.sub.8 is
H. Among the lower alkyl and --CH.sub.2O(C.sub.1-6-alkyl) groups
ethyl and OCH.sub.2CH.sub.3, respectively, are presently most
preferred.
[0275] The linker group Z in all the compounds of the invention is
preferably ethynyl (--C.ident.C--), ester (CO--O), ethenyl,
(--CR.sub.1.ident.CR.sub.1--) or amide (CONR.sub.1). Among these
the ethynyl (--C.ident.C--) and ester (CO--O) linkers are most
preferred. Moreover, in the preferred compounds of the invention
the linker Z is attached to the 6 position in Formula 1, to the 4
position in Formula 2, to the 6 position in Formula 3, to the 6
position in Formula 4, to the 4 position in Formula 5, to the 4
position in Formula 6, to the 6 position in Formula 7, and to the 6
position in Formula 8. These positions are indicated by arabic
numerals in Formulas 1 through 8.
[0276] The R.sub.1 group substituting the non-aromatic rings in
Formulas 1, 3, 4, 7 and 8 is preferably alkyl, more preferably
alkyl of 1 to 3 carbons, and most preferably methyl. The R, group
substituting the cyclopropane ring in Formulas 1, 2, 3 and 7 is
preferably non-existent (p is 0), or is alkyl of 1 to 3 carbons,
even more preferably methyl.
[0277] The X group in Formulas 1 and 5 is preferably 0, and in
Formula 2 X is preferably O or NR.
[0278] The XI group in Formula 4 is preferably 1-imidazolyl,
substituted 1-imidazolyl, or NRR.sub.6, where R.sub.6 is preferably
cyclopropyl or branched-chain alkyl. The X.sub.2 group in Formula 6
is preferably 1-imidazolyl or substituted 1-imidazolyl.
[0279] The X.sub.3 group in Formula 8 is preferably 0 or
C.dbd.O.
[0280] The Y group is preferably H, lower alkyl of 1 to 3 carbons,
cycloalkyl, lower alkyl substituted cycloalkyl, or halogen. Among
these, H, Cl, and cyclopropyl are most preferred.
[0281] The Y.sub.1 group of Formula 8 is preferably H, lower alkyl
of 1 to 3 carbons, cycloalkyl, or lower alkyl substituted
cycloalkyl. Among these H, ethyl and cyclopropyl are presently most
preferred.
[0282] The most preferred compounds of the invention are disclosed
in Tables 2 through 9 with reference to Formulas 9 through 16. The
compounds specifically shown in Tables 2 through 9 are carboxylic
acids, but it should be understood that the Cl .sub.3alkyl esters,
methoxymethyl (OCH.sub.2CH.sub.3) esters and pharmaceutically
acceptable salts of the acids shown in these tables are also highly
preferred.
[0283] It should also be apparent that the preferred compounds
shown in Table 2 with reference to the more specific Formula 9 are
within the scope of Formula 1.
[0284] Similarly, the preferred compounds shown in Table 3 with
reference to the more specific Formula 10 are within the scope of
Formula 2;
[0285] the preferred compounds shown in Table 4 with reference to
the more specific Formula 11 are within the scope of Formula 3;
[0286] the preferred compounds shown in Table 5 with reference to
the more specific Formula 12 are within the scope of Formula 4;
[0287] the preferred compounds shown in Table 6 with reference to
the more specific Formula 13 are within the scope of Formula 5;
[0288] the preferred compounds shown in Table 7 with reference to
the more specific Formula 14 are within the scope of Formula 6;
[0289] the preferred compounds shown in Table 8 with reference to
the more specific Formula 15 are within the scope of Formula 7,
and
[0290] the preferred compounds shown in Table 9 with reference to
the more specific Formula 16 are within the scope of Formula 8.
11
4TABLE 2 Compound Position of No. X Y Z R.sub.2 n
(CH.sub.2).sub.nCOOH 40 O H --C.ident.C-- H 0 4 42 O H
--C.ident.C-- H 1 4 44 O H --C.ident.C-- F 0 4 48 O cyclopropyl
--C.ident.C-- H 1 4 50 O cyclopropyl --C.ident.C-- F 1 4 52 O
cyclopropyl --C.ident.C-- H 0 4 54 O cyclopropyl --C.ident.C-- F 0
4 58 O cyclopropyl --CO--O-- H 1 4 60 O cyclopropyl --CO--O-- H 1 3
66 CH.sub.3N H --C.ident.C-- H 0 4
[0291] 12
5TABLE 3 Compound No. R.sub.5 X R.sub.3 n 110 n-propyl (n-propyl)N
H 0 112 benzyl NH H 0 114 benzyl (n-benzyl)N H 0 108 n-propyl NH H
0 116 benzyl methylN H 0 77 benzyl O H 0 78 benzyl O H 1 70 methyl
O H 1 69 methyl O H 0 73 isopropyl O H 0 74 isopropyl O H 1 82
benzyl O methyl 1 81 benzyl O methyl 0 89
(CH.sub.3).sub.3C--CH.sub.2-- O methyl 0 90
(CH.sub.3).sub.3C--CH.sub.2-- O methyl 1 94 benzyl O ethyl 1 93
benzyl O ethyl 0 86 isopropyl O methyl 1 85 isopropyl O methyl 0
105 ethyl O t-butyl 0 106 ethyl O t-butyl 1 98 isopropyl O ethyl
1
[0292] 13
6TABLE 4 Compound No. R.sub.2 22 F 24 H
[0293] 14
7TABLE 5 Compound No. X.sub.1 R.sub.2 n 3 methyl,cyclopropyl-N H 0
8 methyl,cyclopropyl-N H 1 13 methyl,cyclopropyl-N F 0 18
methyl,cyclopropyl-N F 1 139 1-imidazolyl H 0 137 1-imidazolyl H 1
26 methyl,isopropyl-N H 0
[0294] 15
8TABLE 6 Compound No. R.sub.2 R.sub.7 Y R.sub.3 143 H methyl
t-butyl t-butyl 145 F methyl t-butyl t-butyl
[0295] 16
9TABLE 7 Compound No. X.sub.2 R.sub.3 n 119 1-imidazolyl methyl 0
121 1-imidazolyl methyl 1 127 1-imidazolyl iso-propyl 1 126
1-imidazolyl iso-propyl 0 134 ethyl,cyclopropyl-N iso-propyl 0 130
ethyl,cyclopropyl-N methyl 0 131 ethyl,cyclopropyl-N methyl 1 141
(1-methyl)cyclopropyl-oxy iso-propyl 1
[0296] 17
10TABLE 8 Compound No. R R.sub.2 n 62 H H 0 63 Me H 1
[0297] 18
11TABLE 9 Compound No. X.sub.3 Y.sub.1 R.sub.3 Z R.sub.2 n 28 O H
methyl --C.ident.C-- H 1 30 O H methyl --C.ident.C-- F 0 5 CO H H
--C.ident.C-- H 1 10 CO H H --C.ident.C-- F 0 36 O cyclopropyl
methyl --C.ident.C-- H 1 38 O cyclopropyl methyl --C.ident.C-- F 1
46 O H methyl --CO--O-- H 1 20 CO H H --CO--O-- H 1 32 O H methyl
--C.ident.C-- F 1 56 O ethyl methyl --C.ident.C-- H 1 34 O
cyclopropyl methyl --C.ident.C-- H 0 15 CO H H --C.ident.C-- F
1
[0298] The compounds of the invention can be synthesized by
applying the general synthetic methodology described above, and by
such modifications of the hereinafter described specific synthetic
routes which will become readily apparent to the practicing
synthetic organic chemist in light of this disclosure and in view
of general knowledge available in the art. The hereinafter
disclosed specific reaction schemes are directed to the synthesis
of exemplary and preferred compounds of the invention. Whereas each
of the specific and exemplary synthetic routes shown in these
schemes may describe specific compounds of the invention only
within the scope of one or two of the general Formulas 1 through 8,
the synthetic processes and methods used therein are adaptable
within the skill of the practicing organic chemist and can be used
with such adaptation for the synthesis of compounds of the
invention which are not specifically described herein as
examples.
[0299] Reaction Scheme 1 discloses a presently preferred synthetic
route to certain intermediates or reagents having the general
formula X.sub.4-A(R.sub.2)--CH.sub.2).sub.n--COOR.sub.8, where the
symbol A represents a di-, or tri-substituted phenyl moiety. These
intermediates are utilized in the synthesis of the compounds of the
invention. 1920
[0300] Reaction Scheme 2 discloses presently preferred synthetic
routes to obtain exemplary and preferred tetrahydronaphthalenone
compounds of the invention within the scope of Formula 8 where the
the symbol X.sub.3 represents a C.dbd.O group, Z represents an
ethynyl moiety or a --COO-- (ester) function, and A is a
substituted phenyl moiety.
[0301] Reaction Scheme 3 discloses presently preferred synthetic
routes to obtain exemplary and preferred tetrahydronaphthalene
compounds of the invention within the scope of Formula 4 where
X.sub.1 represents a dialkyl substituted nitrogen, Z is an ethynyl
moiety and A is a substituted phenyl moiety.
[0302] Reaction Scheme 4 discloses presently preferred synthetic
routes to obtain exemplary and preferred isoquinoline compounds of
the invention within the scope of Formula 3 where the, symbol Y
represents hydrogen, Z is an ethynyl moiety and A is a substituted
phenyl moiety.
[0303] Reaction Scheme 5 discloses presently preferred synthetic
routes to obtain exemplary and preferred chroman compounds of the
invention within the scope of Formula 8 where the symbol Y.sub.1
represents hydrogen, Z is an ethynyl moiety or an ester (COO)
function, and A is a substituted phenyl moiety. 212223 2425 2627
28
[0304] Reaction Scheme 6 discloses presently preferred synthetic
routes to obtain other exemplary and preferred chroman compounds of
the invention within the scope of Formula 8 where the symbol Y,
represents a cyclopropyl group, Z is an ethynyl moiety and A is a
substituted phenyl moiety.
[0305] Reaction Scheme 7 discloses presently preferred synthetic
routes to obtain exemplary and preferred chroman compounds of the
invention within the scope of Formula 1 where the symbol X
represents oxygen (O), Y represents hydrogen, Z is an ethynyl
moiety and A is a substituted phenyl moiety.
[0306] Reaction Scheme 8 discloses presently preferred synthetic
routes to obtain other exemplary and preferred chroman compounds of
the invention within the scope of Formula 1 where the symbol X
represents oxygen (O), Y represents a cyclopropyl group, Z is an
ethynyl moiety and A is a substituted phenyl moiety. 2930 31
3233
[0307] Reaction Scheme 9 discloses presently preferred synthetic
routes to obtain exemplary and preferred tetrahydroquinoline
compounds of the invention within the scope of Formula 1 where the
symbol X represents an alkyl substituted nitrogen (alkyl-N), Y
represents hydrogen, Z is an ethynyl moiety and A is a substituted
phenyl moiety.
[0308] Reaction Schemes 10 and 11 disclose presently preferred
synthetic routes to obtain exemplary and preferred phenyl compounds
of the invention within the scope of Formula 2 where the symbol X
represents oxygen (O), R.sub.5 is alkyl or benzyl, Z is an ethynyl
moiety and A is a substituted phenyl moiety.
[0309] Reaction Scheme 12 discloses presently preferred synthetic
routes to obtain exemplary and preferred phenyl compounds of the
invention within the scope of Formula 2 where the symbol R.sub.5-X
represents an alkyl, dialkyl, benzyl or dibenzyl substituted
nitrogen, Z is an ethynyl moiety and A is a substituted phenyl
moiety.
[0310] Reaction Schemes 13 and 14 disclose presently preferred
synthetic routes to obtain exemplary and preferred phenyl compounds
of the invention within the scope of Formula 6 where the symbol
X.sub.2 represents a (1-imidazolyl) moiety, Z is an ethynyl moiety
and A is a substituted phenyl moiety. 34 3536 3738 3940 4142
4344
[0311] Reaction Scheme 15 disclose presently preferred synthetic
routes to obtain exemplary and preferred phenyl compounds of the
invention within the scope of Formula 6 where X.sub.2 represents an
alkyl and cyclopropyl substituted nitrogen
(X.sub.2=(alkyl,cycloalkyl)N), Y represents hydrogen, Z is an
ethynyl moiety and A is a substituted phenyl moiety.
[0312] Reaction Scheme 16 discloses presently preferred synthetic
routes to obtain exemplary and preferred tetrahydronaphthalene
compounds of the invention within the scope of Formula 4 where the
symbol X.sub.1 represents a (1-imidazolyl) moiety, Y represents
hydrogen, Z is an ethynyl moiety and A is a substituted phenyl
moiety.
[0313] Reaction Scheme 17 discloses presently preferred synthetic
routes to obtain exemplary and preferred phenyl compounds of the
invention within the scope of Formula 6 where the symbol X.sub.2
represents a 1-methylcyclopropoxy moiety, Y represents hydrogen, Z
is an ethynyl moiety and A is a substituted phenyl moiety.
[0314] Reaction Scheme 18 discloses presently preferred synthetic
routes to obtain exemplary and preferred phenyl compounds of the
invention within the scope of Formula 5 where the symbol X
represents oxygen (O), Y represents a tertiary-butyl group, Z is an
ethynyl moiety and A is a substituted phenyl moiety. 4546 47 48
49
SPECIFIC EXAMPLES
[0315] 4-Hydroxy phenyl acetic acid-t-butyl ester (Reagent E)
[0316] A stirred suspension of 4-hydroxy-phenyl acetic acid (0.152
g, 1 mmol) in anhydrous toluene (5 mL) was heated at 80.degree. C.
and N,N-dimethyl formamide-di-t-butyl acetal (1 mL, 4.17 mmol) was
added when the solution became homogenous. After 0.5 h, the
reaction mixture was cooled to ambient temperature and the
volatiles were distilled off in vacuo. The residue was diluted with
water and extracted with diethyl ether (x2). The combined organic
extract was dried over anhydrous sodium sulfate, filtered and
evaporated in vacuo to afford an oil which was subjected to flash
column chromatography over silica gel (230-400 mesh) using 16%
ethyl acetate in hexane as the eluent to afford the title compound
as a solid (0.11 g, 56%). .sup.1H-NMR (300 MHz, CDCl.sub.3):.delta.
1.44(s, 9H), 3.45(s, 2H), 6.55(s, 1H), 6.69(d, J=8.8 Hz, 2H),
7.06(d, J=8.5 Hz, 2H).
[0317] 3-Hydroxy phenyl acetic acid-t-butyl ester (Reagent F)
[0318] A stirred suspension of 3-hydroxy-phenyl acetic acid (1.52
g, 10 mmol) in anhydrous toluene (20 mL) was heated at 80.degree.
C. and N,N-dimethyl formamide-di-t-butyl acetal (9.6 mL, 40 mmol)
was added when the solution became homogenous. After 0.5 h, the
reaction mixture was cooled to ambient temperature and the
volatiles were distilled off in vacuo. Th residue was diluted with
water and extracted with diethyl ether (x2). The combined organic
extract was dried over anhydrous sodium sulfate, filtered and
evaporated in vacuo to afford an oil which was subjected to flash
column chromatography over silica gel (230-400 mesh) using 16%
ethyl acetate in hexane as the eluent to afford the title compound
as a solid (1.17 g, 56%). .sup.1H-NMR (300 MHz, CDCl.sub.3):.delta.
1.47(s, 9H), 3.49(s, 2H), 6.30(s, 1H), 6.70-6.79 (m, 2H), 6.81(d,
J=7.6 Hz, 1H), 7.16(t, J=7.7 Hz, 1H).
[0319] Methyl-2-fluoro-4-iodo benzoate (Reagent G)
[0320] A solution of 2-fluoro-4-iodo toluene (5 g, 26.6 mmol) in
pyridine (2 mL) and water (20 mL) was treated with potassium
permanganate (16.6 g, 105 mmol) and heated at 150.degree. C.
overnight. The reaction mixture was then cooled to room temperature
and filtered and the filtrate was extracted with hexane. The
aqueous phase was acidified with 10% hydrochloric acid and
extracted with ethyl acetate. The organic phase was dried over
anhydrous sodium sulfate, filtered and evaporated in vacuo. The
residue was dissolved in 20 mL of methanol, treated with
concentrated sulfuric acid (1 mL) and refluxed overnight. The
volatiles were distilled off in vacuo and the residue was dissolved
in diethyl ether, washed with brine, dried over anhydrous sodium
sulfate, filtered and evaporated in vacuo to an oil. Flash column
chromatography over silica gel (230-400 mesh) using 10% ethyl
acetate in hexane as the eluent afforded the title compound as an
oil (0.26 g, 5%). .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.60
(m, 4H), 3.93 (s, 3H).
[0321] Ethyl-2-fluoro-4-hydroxy benzoate (Reagent I)
[0322] A solution of 2-fluoro-4-hydroxy benzoic acid (Intermediate
4, 3 g, 19.2 mmol) in ethanol (65 mL) and benzene (90 mL) was
treated with concentrated sulfuric acid (1.5 mL) and heated at
reflux overnight using a Dean-Stark water trap. The volatiles were
distilled off in vacuo and the residue was diluted with water and
diethyl ether. The phases were separated and the organic phase was
washed with saturated aqueous sodium bicarbonate (x1), water (x1)
and brine (x1), dried over anhydrous magnesium sulfate, filtered
and evaporated in vacuo to afford the title compound as a solid
(3.07 g, 86%).
[0323] .sup.1H-NMR (300 MHz, CD.sub.3COCD.sub.3): .delta. 1.34 (t,
J=7.1 Hz, 3H), 4.32 (q, J=7.1 Hz, 2H), 6.66(dd, J=2.6, 10.9 Hz,
1H), 6.76 (dd, J=2.3, 8.5 Hz, 1H), 7.83(d, J=8.4 Hz, 1H), 9.91 (s,
1H).
[0324] Ethyl-2-fluoro-4-trifluoromethylsulfonyloxy-benzoate
(Intermediate 6)
[0325] A stirred, cooled (ice bath) solution of
ethyl-2-fluoro-4-hydroxy-b- enzoate (Intermediate 5, 0.368 g, 2
mmol) and 2,6-di-tert-butyl-4-methylpy- ridine (0.81 g, 8 mmol) in
8 mL of dichloromethane was treated with trifluoromethanesulfonic
anhydride (0.1 g, 4 mmol). The reaction mixture was allowed to warm
to ambient temperature and stirred overnight. The reaction mixture
was subjected to flash column chromatography over silica gel
(230-400 mesh) using 5-10% ethyl acetate in hexane as the eluent to
afford the title compound (0.53 g, 85%).
[0326] .sup.1H-NMR (300 MHz, CDCl.sub.3): .delta. 1.41 (t, J=7.3
Hz, 3H), 4.42 (q, J=7.1 Hz, 2H), 7.12-7.20(m, 2H), 8.08(t, J=8.3
Hz, 1H).
[0327] Ethyl-2-fluoro-4-trimethylsilanylethynyl-benzoate
(Intermediate 7)
[0328] A solution of
ethyl-2-fluoro-4-trifluoromethylsulfonyloxy-benzoate (Intermediate
6, 1.82 g, 6 mmol) in triethyl amine (12 mL) and anhydrous
tetrahydrofuran (30 mL) was treated with copper(I)iodide (0. 12 g,
0.6 mmol) and sparged with argon.
Dichlorobis(triphenylphosphine)palladium(II- ) (0.43 g, 0.6 mmol)
was added followed by (trimethylsilyl)acetylene (3.6 mL, 24 mmol)
and the resulting reaction mixture was heated at 70.degree. C.
overnight. It was then cooled to ambient temperature, diluted with
diethyl ether and filtered over a bed of celite. The filtrate was
evaporated in vacuo to an oil which was subjected to flash column
chromatography over silica gel (230-400 mesh) using 5% ethyl
acetate in hexane as the eluent to afford the title compound as an
orange oil (1.5 g, quantitative).
[0329] .sup.1H-NMR (300 MHz, CDCl.sub.3):.delta. 0.011 (s, 9H),
1.13(t, J=7.1 Hz, 3H), 4.13 (q, J=7.1 Hz, 2H), 6.93-7.02(m, 2H),
7.07 (s, 1H), 7.61(t, J=7.9 Hz, 1H).
[0330] Ethyl-4-ethynyl-2-fluoro benzoate (Reagent D)
[0331] A solution of
ethyl-2-fluoro-4-trimethylsilanylethynyl-benzoate (Intermediate 7,
1.5 g, 6 mmol) in ethanol (16 mL) was treated with potassium
carbonate (1.485 g, 10.74 mmol) and stirred overnight at room
temperature. The reaction mixture was then diluted with water and
extracted with diethyl ether (x2). The combined organic phase was
dried over anhydrous magnesium sulfate, filtered and evaporated in
vacuo to afford an orange oil. Flash column chromatography over
silica gel (230-400 mesh) using 5% ethyl acetate in hexane as the
eluent afforded the title compound (1 g, 86%).
[0332] .sup.1H-NMR (300 MHz, CDCl.sub.3):.delta. 1.39 (t, J=7.1 Hz,
3H), 3.26 (s, 1H), 4.39 (q, J=7.1 Hz, 2H), 7.22-7.33 (m, 2H),
7.88(t, J=7.7 Hz, 1H).
[0333] Methyl-4-iodo-phenyl acetate (Reagent B)
[0334] A solution of 4-iodo phenyl acetic acid (5 g, 19 mmol) in
methanol was treated with concentrated sulfuric acid (0.5 mL) and
refluxed overnight. The volatiles were distilled off in vacuo and
the residue was dissolved in ethyl acetate, washed with brine,
dried over anhydrous sodium sulfate, filtered and evaporated in
vacuo to an oil which was subjected to flash column chromatography
over silica gel (230-400 mesh) using 5% ethyl acetate in hexane as
the eluent to afford the title compound as a clear oil (5 g,
95%).
[0335] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.63 (d, 2H,
J=8.5 Hz), 7.01 (d, 2H, J=8.0 Hz), 3.67 (s, 3H), 3.55 (s, 2H).
[0336] 2-Fluoro-4-iodo-phenyl acetonitrile (Intermediate 2)
[0337] A solution of 2-fluoro-4-iodo-benzyl bromide (Intermediate
1, 2.56 g, 8.15 mmol) in ethanol (55 mL and water (10 mL) was
treated with sodium cyanide (2.15 g, 43.86 mmol) and refluxed for
0.5 h. The volatiles were distilled off in vacuo and the residue
was diluted with water and extracted with diethyl ether (x2). The
combined organic extract was washed with water (x1) and brine (x1),
dried over anhydrous magnesium sulfate, filtered and evaporated in
vacuo to afford the title compound as a pale yellow solid (2.05 g,
96%).
[0338] .sup.1H-NMR (300 MHz, CDCl.sub.3): .delta. 3.71(s, 3H),
7.16(t, J=8.2 Hz, 1H), 7.45(dd, J=1.7, 9.1 Hz, 1H), 7.51(dd, J=1.5,
8.2 Hz, 1H).
[0339] 2-Fluoro-4-iodo-phenyl acetic acid (Intermediate 3)
[0340] A solution of 2-fluoro-4-iodo-phenyl acetonitrile
(Intermediate 2, 2.05 g, 7.83 mmol) in ethanol (50 mL and water (1
5 mL) was treated with potassium hydroxide (3.4 g, 60.7 mmol) and
refluxed for 4 h. The volatiles were distilled off in vacuo and the
residue was diluted with water and poured into cold, dilute
hydrochloric acid and the precipitated solid was filtered. The
solid was dissolved in diethyl ether, and the organic solution was
dried over anhydrous magnesium sulfate, filtered and evaporated in
vacuo to afford the title compound a pale yellow solid (1.75 g,
79%).
[0341] .sup.1H-NMR (300 MHz, CDCl.sub.3):.delta. 3.64 (s, 2H),
6.98(t, J=7.9 Hz, 1H), 7.25-7.46 (m, 2H), 9.60-10.40(br s, 1
H).
[0342] Ethyl-2-fluoro-4-iodo-phenyl acetate (Reagent C)
[0343] A solution of 2-fluoro-iodo-phenyl acetic acid (Intermediate
3, 1.75 g, 6.22 mmol) in ethanol (50 mL) and benzene (100 mL) was
treated with concentrated sulfuric acid (1.4 mL) and heated at
reflux overnight using a Dean-Stark water trap. The volatiles were
distilled off in vacuo and the residue was diluted with water and
diethyl ether. The phases were separated and the organic phase was
washed with saturated aqueous sodium bicarbonate (x1), water (x1)
and brine (x1), dried over anhydrous magnesium sulfate, filtered
and evaporated in vacuo to afford an oil which was subjected to
flash column chromatography over silica gel (230-400 mesh) using
5%-10% ethyl acetate in hexane as the eluent to afford the title
compound as a pale yellow solid (1..sup.4 g, 73%).
[0344] .sup.1H-NMR (300 MHz, CDCl.sub.3): .delta. 1.25 (t, J=7.1
Hz, 3H), 3.60 (s, 2H), 4.16 (q, J=7.1 Hz, 2H), 6.99(t, J=8.0 Hz,
1H), 7.39-7.44(m, 2H).
[0345] Methyl-2-fluoro-4-iodo-phenyl acetate (Reagent H)
[0346] A solution of 2-fluoro-4-iodo-phenyl acetonitrile
(Intermediate 2, 3 g, 11.45 mmol) in methanol (50 mL) and benzene
(50 mL) was treated with p-toluene sulfonic acid (2.5 g, 13.15
mmol) and heated at reflux overnight using a Dean-Stark water trap.
The volatiles were distilled off in vacuo and the residue was
diluted with water and diethyl ether. The phases were separated and
the organic phase was washed with saturated aqueous sodium
bicarbonate (x1), water (x1) and brine (x1), dried over anhydrous
magnesium sulfate, filtered and evaporated in vacuo to afford an
oil which was subjected to flash column chromatography over silica
gel (230-400 mesh) using 6% ethyl acetate in hexane as the eluent
to afford the title compound as a colorless oil (2.7 g, 80%).
[0347] .sup.1H-NMR (300 MHz, CDCl.sub.3): .delta. 3.62 (s, 2H),
3.70 (s, 3H), 6.99(t, J=7.9 Hz, 1H), 7.39-7.45(m, 2H).
[0348] GENERAL PROCEDURE A:
7-Methoxy-1-dimethyl-1,2,3,4-tetrahydronaphtha- lene (Intermediate
8)
[0349] A stirred, cooled (-40.degree. C.) solution of titanium
tetrachloride in anhydrous dichloromethane (1 M, 20 mL) under
argon, was treated with a solution of dimethyl zinc (2M, 40 mL) in
toluene. After 0.5 h, a solution of 7-methoxy-1-tetralone (1.76 g,
10 mmol) in anhydrous dichloromethane (5 mL) was cannulated into
the reaction mixture and the resulting solution was allowed to warm
to ambient temperature and stirred overnight. The reaction mixture
was then cooled to -40.degree. C. and cautiously quenched with
methanol (11 mL). It was diluted with dichloromethane and saturated
aqueous ammonium chloride solution. The phases were separated and
the aqueous phase was extracted with dichloromethane (x2 mL). The
combined organic phase was dried over anhydrous sodium sulfate,
filtered and evaporated in vacuo to the title compound (1.75 g,
92%) as an oil.
[0350] .sup.1H-NMR (300 MHz, CDCl.sub.3):.delta. 1.33(s, 6H),
1.67-1.71(m, 2H), 1.79-1.90(m, 2H), 2.75(t, J=6.2 Hz, 2H), 3.83(s,
3H), 6.72(dd, J=2.6, 8.3 Hz, 1H), 6.93(d, J=2.6 Hz, 1H), 7.02(d,
J=8.3 Hz, 1H).
[0351] GENERAL PROCEDURE B:
6-Methoxy-4,4-dimethyl-1,2,3,4-tetrahydronapht- halene-1-one
(Intermediate 9)
[0352] A solution of
7-methoxy-1,1-dimethyl-1,2,3,4-tetrahydronaphthalene (Intermediate
8, 1.65 g, 8.7 mmol) in 7.5 mL of glacial acetic acid was cooled to
0.degree. C. and treated with a solution of chromium trioxide (2 g,
20 mmol) in 8 mL of acetic acid and 7 mL of water. The reaction
mixture was then allowed to warm to ambient temperature and stirred
overnight. It was diluted with water and extracted with diethyl
ether (x2). The combined organic phase was washed with water (x1),
saturated aqueous sodium bicarbonate (x1) and brine (x1), dried
over anhydrous magnesium sulfate, filtered and evaporated in vacuo
to afford the title compound (1.64 g, 93%) as a yellow oil.
[0353] .sup.1H-NMR (300 MHz, CDCl.sub.3):.delta. 1.34(s, 6H),
1.96(t, J=7.1 Hz, 2H), 2.64(t, J=7.1 Hz, 2H), 3.83(s, 3H), 6.77(dd,
J=2.6, 8.7 Hz, 1H), 6.83(d, J=2.5 Hz, 1H), 7.98(d, J=8.7 Hz,
1H).
[0354] 6-Hydroxy-4,4-dimethyl-1,2,3,4-tetrahydronaphthalene-1-one
(Intermediate 10)
[0355] A stirred, cooled (-78.degree. C.) solution of
6-methoxy-4,4-dimethyl-1,2,3,4-tetrahydronaphthalene-1-one
(Intermediate 9, 0.8, 3 mmol) under argon was treated with a 1M
solution of boron tribromide (10 mL). The reaction mixture was
allowed to warm to ambient temperature and stirred overnight. The
reaction mixture was cooled to -78.degree. C., quenched and diluted
with saturated aqueous sodium bicarbonate solution and the aqueous
phase was extracted with dichloromethane (x2). The combined organic
phase was dried over anhydrous sodium sulfate, filtered and
evaporated in vacuo to an oil. Flash column chromatography over
silica gel (230-400 mesh) using 30% ethyl acetate in hexane as the
eluent afforded the title compound (0.3 g, 52%) as a yellow viscous
oil. .sup.1H-NMR (300 MHz, CDCl.sub.3):.delta. 1.33(s, 6H), 1.97(t,
J=6.8 Hz, 2H), 2.71(t, J=6.7 Hz, 2H), 6.81(dd, J=2.3, 8.5 Hz, 1H),
6.94(d, J=2.3 Hz, 1H), 7.98(d, J=8.7 Hz, 1H), 9.35(s, 1H).
[0356] GENERAL PROCEDURE C:
4,4-Dimethyl-6-trifluoromethylsulfonyloxy-1,2,-
3,4-tetrahydronaphthalene-1-one (Intermediate 11)
[0357] A stirred, cooled (0.degree. C.) solution of
6-hydroxy-4,4-dimethyl-1,2,3,4-terahydronaphthalene-1-one
(Intermediate 10, 0.3 g, 1.6 mmol) in anhydrous dichloromethane (10
mL) was treated with 4-(dimethylamino)pyridine (0.36 g, 3.27 mmol)
followed by
2-[N,N'-bis(trifluoromethylsulfonyl)amino]-5-chloropyridine (0.79
g, 2 mmol). After stirring at ambient temperature for 0.75 h, the
reaction mixture was diluted with dichloromethane and washed with
water (x1). The organic phase was dried over anhydrous sodium
sulfate, filtered and evaporated in vacuo to an oil. Flash column
chromatography over silica gel (230-400 mesh) using 8-10% ethyl
acetate in hexane as the eluent afforded the title compound (0.462
g, 90%) as an off-white solid.
[0358] .sup.1H-NMR (300 MHz, CDCl.sub.3): .delta. 1.36(s, 6H),
2.01(t, J=6.8 Hz, 2H), 2.70(t, J=6.7 Hz, 2H), 7.15(dd, J=2.5, 8.7
Hz, 1H), 7.28(d, J=2.4 Hz, 1H), 8.06(d, J=8.7 Hz, 1H).
[0359] GENERAL PROCEDURE D:
4,4-Dimethyl-6-trimethylsilanyl-ethynyl-1,2,3,-
4-tetrahydronaphthalene-1-one (Intermediate 12)
[0360] A solution of
4,4-dimethyl-6-trifluoromethylsulfonyloxy-1,2,3,4-tet-
rahydronaphthalene-1-one (Intermediate 11, 0.46 g, 1.43 mmol) in
triethyl amine (3 mL) and anhydrous tetrahydrofuran (8 mL) was
treated with copper(I)iodide (0.1 g, 0.53 mmol) and sparged with
argon for 5 minutes. Trimethylsilyl acetylene (0.85 mL, 6 mmol) was
then added followed by dichlorobis(triphenylphosphine)palladium(II)
(0.25 g, 0.36 mmol). The resulting reaction mixture was heated at
70.degree. C. for 17 h. It was then cooled to ambient temperature,
diluted with diethyl ether and filtered over a bed of celite. The
filtrate was evaporated vacuo to an oil which was subjected to
flash column chromatography over silica gel (230-400 mesh) using 5%
ethyl acetate in hexane as the eluent to afford the title compound
(0.28 g, 72%).
[0361] .sup.1H-NMR (300 MHz, CDCl.sub.3):.delta. 0.26(s, 9H),
1.36(s, 6H), 1.99(t, J=6.8 Hz, 2H), 2.69(t, J=6.7 Hz, 2H), 7.35(dd,
J=1.7, 8.2 Hz, 1H), 7.49 (unresolved d, 1H), 7.93(d, J=8.1 Hz,
1H).
[0362] GENERAL PROCEDURE E:
6-Ethynyl-4,4-dimethyl-1,2,3,4-tetrahydronphth- alene-1-one
(Intermediate 13)
[0363] A solution of
4,4-dimethyl-6-trimethylsilanylethynyl-1,2,3,4-tetrah-
ydronaphthalene-1-one (Intermediate 12, 0.28 g, 1.03 mmol) in
methanol (10 mL) was treated with potassium carbonate (0.74 g, 5.35
mmol) and stirred at ambient temperature for 4 h. The volatiles
were distilled off in vacuo and the residue was diluted with water
and extracted with diethyl ether (x2). The combined organic extract
was dried over anhydrous magnesium sulfate, filtered and evaporated
in vacuo to afford the title compound (0.19 g, 89%) as an oil that
solidified on standing.
[0364] .sup.1H-NMR (300 MHz, CDCl.sub.3):.delta. 1.33(s, 6H),
1.96(t, J=6.8 Hz, 2H), 2.67(t, J=6.8 Hz, 2H), 3.25(S, 1H), 7.33(dd,
J=1.5, 8.1 Hz, 1H), 7.49 (d, J=1.5 Hz, 1H), 7.13(d, J=8. 1 Hz,
1H).
[0365] GENERAL PROCEDURE F:
4-(8,8-Dimethyl-5-oxo-5,6,7,8-tetrahydronaphth-
alene-2-yl-ethynyl)-benzoic acid ethyl ester (Intermediate 14)
[0366] A solution of
6-ethynyl-4,4-dimethyl-1,2,3,4-tetrahydronaphthalene-- 1-one
(Intermediate 13, 0.23 g, 1.1 mmol) and ethyl-4-iodo benzoate
(Reagent A, 0.36 g, 1.3 mmol) in triethyl amine (7 mL) and
anhydrous tetrahydrofuran (3 ml) was treated with copper(I)iodide
(0.114 g, 0.6 mmol) and sparged with argon for 5 minutes.
Dichlorobis(triphenylphosphin- e)palladium(II) (0.23 g, 0.33 mmol)
was added and the reaction mixture was stirred overnight at room
temperature. It was diluted with diethyl ether and filtered over a
bed of celite. The filtrate was evaporated in vacuo to a brown oil
that was subjected to flash column chromatography over silica gel
(230-400 mesh) using 6-7% ethyl acetate in hexane as the eluent to
afford the title compound (0.29 g, 72%) as a pale brown solid.
[0367] .sup.1H-NMR (300 MHz, CDCl.sub.3): .delta. 1.3(t, J=7.1 Hz,
3H), 1.37(s, 6H), 1.80 (t, J=6.8 Hz, 2H), 2.69(t, J=6.8 Hz, 2H),
4.35(q, J=7. 1 Hz, 2H), 7.40(dd, J=1.5, 8.2 Hz, 1H), 7.51 (d, J=1.6
Hz, 1H), 7.57 (d, J=8.3 Hz, 2H), 7.96(d, J=8.2 Hz, I H), 7.99(d,
J=8.5 Hz, 2H).
[0368] GENERAL PROCEDURE G
4-(5-Cyclopropylamino-8,8-dimethyl-5,6,7,8-tetr-
ahydro-naphthalene-2yl-ethynyl)-benzoic acid ethyl ester (Compound
1, General Formula 4)
[0369] A solution of
4-(8,8-dimethyl-5-oxo-5,6,7,8-tetrahydro-naphthalene--
2-ylethynyl)-benzoic acid ethyl ester (Intermediate 14, 0.14 g, 0.4
mmol) in 3 mL of dichloromethane and 2 mL of acetonitrile was
treated with cyclopropyl amine(1 mL, 14.45 mmol). After 5 minutes,
acetic acid (1 mL) was added followed by sodium cyanoborohydride
(0.13 g, 2 mmol). The reaction was stirred overnight at ambient
temperature. It was then diluted with water and saturated aqueous
sodium carbonate solution and extracted with dichloromethane (x2).
The combined organic extract was dried over anhydrous sodium
sulfate, filtered and evaporated in vacuo to an oil. Flash column
chromatography over silica gel (230-400 mesh) using 20% ethyl
acetate in hexane as the eluent afforded the title compound (0.1 g,
62%) as a pale yellow solid.
[0370] .sup.1H-NMR (300 MHz, CDCl.sub.3): .delta. 0.30-0.60(m, 4H),
1.28(s, 3H), 1.35 (s, 3H), 1.30(t, J=7.1 Hz, 3H), 1.55-1.61(m, 1H),
1.83-2.05(m, 3H), 2.25 (quintet, J=3.0 Hz, 1H), 3.80 (t, J=4.9 Hz,
1H), 4.39(q, J=7.1 Hz, 2H), 7.27-7.36(m, 2H), 7.52 (s, 1H), 7.55(d,
J=8.3 Hz, 2H), 8.03(d, J=8.5 Hz, 2H).
[0371] GENERAL PROCEDURE H
4-[(5-Cyclopropyl-methyl-amino)-8,8-dimethyl-5,-
6,7,8-tetrahydro-naphthalene-2-ylethynyl]-benzoic acid ethyl ester
(Compound 2, General Formula 4)
[0372] A solution of
4-(5-cyclopropylamino-8,8-dimethyl-5,6,7,8-tetrahydro-
-naphthalene-2-ylethynyl)-benzoic acid ethyl ester (Compound 1,
0.064 g, 0.16 mmol) in acetone (2 mL) was treated with potassium
carbonate (0.6 g, 4.34 mmol) and methyl iodide (1 mL, 16 mmol) and
stirred overnight at ambient temperature. The volatiles were
distilled off in vacuo and the residue was diluted with water and
extracted with dichloromethane (x2). The combined organic extract
was dried over anhydrous sodium sulfate, filtered and evaporated in
vacuo to afford the title compound (0.065 g, 99%).
[0373] .sup.1H-NMR (300 MHz, CDCl.sub.3): .delta. 0.28-0.49 (m,
4H), 1.21(s, 3H), 1.26 (s, 3H), 1.33 (t, J=7.1 Hz, 3H), 1.58-1.73
(m, 2H), 1.83-1.89 (m, 2H), 2.02-2.08 (m, 1H), 2.06 (s, 3H), 3.88
(t, J=8.1 Hz, 1H), 4.32(q, J=7.1 Hz, 2H), 7.20(d, J=7.8 Hz, 1H),
7.41 (s, 1H), 7.46 (d, J=7.8 Hz, 1H), 7.52(d, J=8.4 Hz, 2H),
8.03(d, J=8.3 Hz, 2H).
[0374] GENERAL PROCEDURE I:
4-[(5-Cyclopropyl-methyl-amino)-8,8-dimethyl-5-
,6,7,8-tetrahydro-naphthalene-2yl-ethynyl]-benzoic acid (Compound
3, General Formula 4)
[0375] A solution of
4-[(5-cyclopropyl-methyl-amino)-8,8-dimethyl-5,6,7,8--
tetrahydro-naphthalene-2-ylethynyl]-benzoic acid ethyl ester
(Compound 2, 0.065 g, 0.158 mmol) in ethanol (1 mL) and
tetrahydrofuran (1 mL) was treated with 1M aqueous sodium hydroxide
solution (1 mL) and heated at 80.degree. C. for 1 h. The volatiles
were distilled off in vacuo and the residue was diluted with
saturated aqueous ammonium chloride solution and extracted with
ethyl acetate (x2). The combined organic extract was dried over
anhydrous sodium sulfate, filtered and evaporated in vacuo to
afford a solid that was washed with dichoromethane and dried to
afford the title compound (0.029 g, 38%) as a white solid.
[0376] .sup.1H-NMR (300 MHz, CD.sub.3COCD.sub.3): .delta.
0.35-0.51(m, 4H), 1.26(s, 3H), 1.29 (s, 3H), 1.60-1.82(m, 2H),
1.88-2.02(m, 2H), 2.02-2.15 (m, 1H), 2.10 (s, 3H), 3.93 (t, J=8.0
Hz, 1H), 7.26(dd, J=1.5, 8.2 Hz, 1H), 7.51 (d, J=1.5 Hz, 1H),
7.52(d, J=8.2 Hz, 1H), 7.62(d, J=8.5 Hz, 2H), 8.02(d, J=8.2 Hz,
2H).
[0377]
4-[(8,8-Dimethyl-5-oxo-5,6,7,8-tetrahydro-naphthalene-2-yl-ethynyl)-
-phenyl]-acetic acid methyl ester (Compound 4, General Formula 8)
Following general procedure F and using
6-ethynyl-4,4-dimethyl-1,2,3,4-te- trahydro-naphthalene-1-one
(Intermediate 13, 0.312 g, 1.5 mmol), 4-iodo phenyl acetic acid
methyl ester (Reagent B, 0.50 g, 1.8 mmol), triethyl amine (7 mL),
anhydrous tetrahydrofuran (3 mL), copper(I)iodide (0.04 g, 0.2
mmol) and dichlorobis(triphenylphosphine)palladium(II) (0.15 g,
0.213 mmol) followed by flash column chromatography over silica gel
(230-400 mesh) using 16-20% ethyl acetate in hexane as the eluent,
the title compound was obtained as a pale yellow solid (0.42 g,
76%).
[0378] .sup.1H-NMR (300 MHz, CDCl.sub.3):.delta. 1.42(s, 6H),
2.04(t, J=6.7 Hz, 2H), 2.74(t, J=6.7 Hz, 2H), 3.66(s, 2H), 3.71(s,
3H), 7.29 (d, J=8.2 Hz, 2H), 7.43(dd, J=1.5, 7.9 Hz, 1H), 7.52 (d,
J=8.2 Hz, 2H), 7.57 (d, J=1.5 Hz, 1H), 8.00(d, J=8.2 Hz, 1H).
[0379] GENERAL PROCEDURE J:
4-[(8,8-Dimethyl-5-oxo-5,6,7,8-tetrahydro-naph-
thalene-2-yl-ethynyl)-phenyl]-acetic acid (Compound 5, General
Formula 8)
[0380] A solution of
4-[(8,8-dimethyl-5-oxo-5,6,7,8-tetrahydro-naphthalene-
-2-ylethynyl)-phenyl]-acetic acid methyl ester (Compound 4, 0.1 g,
0.28 mmol) in a mixture of methanol (2 mL), tetrahydrofuran (3.5
mL) and water (1.5 mL) was treated with lithium hydroxide
monohydrate (0.11 g, 2.62 mmol) and the resulting reaction mixture
was stirred at ambient temperature for 3 h. The volatiles were
distilled off in vacuo and the residue was diluted with water and
dilute hydrochloric acid and extracted with ethyl acetate (x3). The
combined organic phase was dried over anhydrous sodium sulfate,
filtered and evaporated in vacuo to afford the title compound as a
pale yellow solid (0.088 g, 92%).
[0381] .sup.1H-NMR (300 MHz, CDCl.sub.3): .delta. 1.41(s, 6H),
2.02(t, J=6.7 Hz, 2H), 2.74(t, J=6.8 Hz, 2H), 3.68(s, 2H), 7.28 (d,
J=8.2 Hz, 2H), 7.42(dd, J=1.5, 8.2 Hz, 1H), 7.52 (d, J=8.2 Hz, 2H),
7.56 (d, J=1.5 Hz, 1H), 7.99(d, J=8.2 Hz, 1H).
[0382]
4-[(5-(Cyclopropyl-amino)-8,8-dimethyl-5,6,7,8-tetrahydro-naphthale-
ne-2-yl-ethynyl)-phenyl]-acetic acid methyl ester (Compound 6,
General Formula 4)
[0383] Following general procedure G and using
4-[(8,8-dimethyl-5-oxo-5,6,-
7,8-tetrahydro-naphthalene-2-yl-ethynyl)-phenyl]-acetic acid methyl
ester (Compound 4, 0.2 g, 0.54 mmol), dichloromethane (4 mL),
acetonitrile(2 mL), cyclopropyl amine(1 mL, 14.45 mmol), acetic
acid (1 mL)and sodium cyanoborohydride (0.16 g, 2.54 mmol) followed
by flash column chromatography over silica gel (230-400 mesh) using
30% ethyl acetate in hexane as the eluent the title compound was
obtained as a pale yellow oil (0.22 g, 99%).
[0384] .sup.1H-NMR (300 MHz, CDCl.sub.3): .delta. 0.38-0.60 (m,
4H), 1.26(s, 3H), 1.33(s, 3H), 1.50-1.59(m, 1H), 1.79-2.10 (m, 3H),
2.25(m, 1H), 3.63(s, 2H), 3.69(s, 3H), 3.79(t, J=4.8 Hz, 1H),
7.20-7.32 (m, 4H), 7.47(s, 1H), 7.58(d, J=8.2 Hz, 2H).
[0385]
4-[(5-(Cyclopropyl-methyl-amino)-8,8-dimethyl-5,6,7,8-tetrahydro-na-
phthalene-2-yl-ethynyl)-phenyl]-acetic acid methyl ester (Compound
7, General Formula 4)
[0386] Following general procedure H and using
4-[(5-(cyclopropyl-amino)-8-
,8-dimethyl-5,6,7,8-tetrahydro-naphthalene-2-ylethynyl)-phenyl]-acetic
acid methyl ester (Compound 6, O.15 g, 0.37 mmol), acetone (5 mL),
potassium carbonate (I.1 g, 7.95 mmol) and methyl iodide (1 mL, 16
mmol), the following work-up was used. The volatiles were distilled
off in vacuo and the residue was diluted with water and extracted
with dichloromethane (x2). The combined organic extract was dried
over anhydrous sodium sulfate, filtered and evaporated in vacuo to
afford the title compound (0.148 g, 97%).
[0387] .sup.1H-NMR (300 MHz, CDCl.sub.3): .delta. 0.38-0.58(m, 4H),
1.27(s, 3H), 1.31 (s, 3H), 1.68-1.81(m, 2H), 1.85-1.98(m, 2H),
2.08-2.15 (m, 1H), 2.12 (s, 3H), 3.62(s, 2H), 3.69(s, 3H), 3.94 (t,
J=7.9 Hz, 1H), 7.24(d, J=8.2 Hz, 1H), 7.24 (d, J=8.2 Hz, 2H),
7.44-7.51(m, 4H).
[0388]
4-[(5-(Cyclopropyl-methyl-amino)-8,8-dimethyl-5,6,7,8-tetrahydro-na-
phthalene-2-yl-ethynyl)-phenyl]-acetic acid (Compound 8, General
Formula 4)
[0389] Following general procedure J and using
4-[(5-(cyclopropyl-methyl-a-
mino)-8,8-dimethyl-5,6,7,8-tetrahydro-naphthalene-2ylethynyl)-phenyl]-acet-
ic acid methyl ester (Compound 7, 0.148 g, 0.357 mmol), methanol (2
mL), tetrahydrofuran (4 mL), water (1 mL) and lithium hydroxide
monohydrate (0.25 g, 5.95 mmol) followed by flash column
chromatography over silica gel (230-400 mesh) using 30-75% ethyl
acetate in hexane as the eluent, the title compound was obtained as
a white solid (0.08 g, 56%). .sup.1H-NMR (300 MHz, CDCl.sub.3):
.delta. 0.52-0.54(m, 2H), 0.68-0.70(m, 2H), 1.27(s, 3H), 1.29(s,
3H), 1.63-1.80(m, 2H), 1.95-2.17(m, 2H), 2.19-2.24(m, 1H), 2.24(s,
3H), 3.60(s, 2H), 4.18(t, J=7.7 Hz, 1H), 7.24(dd, J=1.5, 8.2 Hz,
1H), 7.26 (d, J=8.2 Hz, 2H), 7.43 (d, J=8.2 Hz, 1H), 7.47(s, 1H),
7.47(d, J=8.2 Hz, 2H), 10.37(br s, 1H).
[0390]
2-Fluoro-4-[(8,8-dimethyl-5-oxo-5,6,7,8-tetrahydro-naphthalen-2-yl--
ethynyl]benzoic acid ethyl ester (Compound 9, General Formula
8)
[0391] A solution of
4,4-dimethyl-6-trifluromethylsulfonyloxy-1,2,3,4-tetr-
ahydro-naphthalene-1-one (Intermediate 11, 0.3 g, 0.9 mmol),
copper(I)iodide (0.057 g, 0.3 mmol) and
ethyl-2-fluoro-4-ethynyl-benzoate (Reagent D, 0.44 g, 2.27 mmol) in
triethyl amine (2 mL) and tetrahydrofuran (3 mL) was sparged with
argon for 5 minutes and treated with
dichlorobis(triphenylphosphine)palladium(II) (0.135 g, 0.192 mmol)
and stirred at room temperature overnight and then refluxed for 2
h. It was then cooled to ambient temperature, diluted with diethyl
ether and filtered over a bed of celite. The filtrate was
evaporated in vacuo to an oil which was subjected to flash column
chromatography over silica gel (230-400 mesh) using 10-15% ethyl
acetate in hexane as the eluent to afford the title compound as a
yellow solid (0.22 g, 67%).
[0392] .sup.1H-NMR (300 MHz, CDCl.sub.3): .delta. 1.38 (t, J=7.0
Hz, 3H), 1.39(s, 6H), 2.01(t, J=6.7 Hz, 2H), 2.71(t, J=6.7 Hz, 2H),
4.37(q, J=7 Hz, 2H), 7.28(dd, J=0.9, 10 Hz, 1H), 7.34(dd, J=0.9,
8.2 Hz, 1H), 7.41 (dd, J=1.5, 8.2 Hz, 1H), 7.57(d, J=0.9 Hz),
7.90(t, J=7.9 Hz, 1H), 7.93 (d, J=7.9 Hz, 1H).
[0393]
2-Fluoro-4-(8,8-dimethyl-5-oxo-5,6,7,8-tetrahydro-naphthalen-2yl-et-
hynyl)-benzoic acid (Compound 10, General Formula 8)
[0394] A solution of
2-fluoro-4-(8,8-dimethyl-5-oxo-5,6,7,8-tetrahydro-nap-
hthalen-2-ylethynyl)benzoic acid ethyl ester (Compound 9, 0.1 g,
0.274 mmol) in ethanol(4 mL), methanol (2 mL) and tetrahydrofuran
(2 mL) was treated with 1 M aqueous sodium hydroxide solution and
heated at 70.degree. C. for 1 h. The volatiles were distilled off
in vacuo and the residue was diluted with water and dilute
hydrochloric acid and extracted with ethyl acetate (x2). The
combined organic extract was dried over anhydrous sodium sulfate,
filtered and evaporated in vacuo to afford a solid that was
recrystallized from hot aqueous acetonitrile to afford the title
compound (0.025 g, 27%).
[0395] .sup.1H-NMR (300 MHz, CDCl.sub.3): .delta. 1.43(s, 6H),
2.05(t, J=6.9 Hz, 2H), 2.76(t, J=6.9 Hz, 2H), 7.26-7.47(m, 3H),
7.60(d, J=1.1 Hz, 1H), 7.99-8.05(m, 2H).
4-[5-(Cyclopropyl-amino)-8,8-dimethyl-5,6,7,8-tetr-
ahydro-naphthalene-2-yl-ethynyl]-2-fluoro-benzoic acid ethyl ester
(Compound 11, General Formula 4)
[0396] Following general procedure G and using
2-fluoro-4-(8,8-dimethyl-5--
oxo-5,6,7,8-tetrahydro-naphthalene-2-ylethynyl)-benzoic acid ethyl
ester
[0397] (Compound 9, 0.132 g, 0.3 mmol), dichloromethane (4 mL),
acetonitrile(2 mL), cyclopropyl amine(1 mL, 14.45 mmol), acetic
acid (1 mL) and sodium cyanoborohydride (0.1 8 g, 2.86 mmol)
followed by flash column chromatography over silica gel (230-400
mesh) using 16-20% ethyl acetate in hexane as the eluent, the title
compound was obtained as a pale yellow oil (0.1 g, 82%).
[0398] .sup.1H-NMR (300 MHz, CDCl.sub.3):.delta. 0.36-0.54 (m, 4H),
1.27(s, 3H), 1.33(s, 3H), 1.40(t, J=7.0 Hz, 3H), 1.54-1.61(m, 2H),
1.82-2.05 (m, 2H), 2.26(m, 1H), 3.79 (t, J=4.9 Hz, 1H), 4.39(q,
J=7.1 Hz, 2H), 7.26-7.50(m, 4H), 7.87(s, 1H), 7.92 (t, J=7.9 Hz,
1H).
[0399]
4-[5-(Cyclopropyl-methyl-amino)-8,8-dimethyl-5,6,7,8-tetrahydro-nap-
hthalene-2-yl-ethynyl]-2-fluoro benzoic acid ethyl ester (Compound
12, General Formula 4)
[0400] Following general procedure H and using
4-[5-(cyclopropyl-methyl-am-
ino)-8,8-dimethyl-5,6,7,8-tetrahydro-naphthalene-2-ylethynyl]-2-fluoro-ben-
zoic acid ethyl ester (Compound 11, 0.1 g, 0.246 mmol), acetone (4
mL), potassium carbonate (0.917 g, 6.63 mmol) and methyl iodide
(0.8 mL, 11 mmol), the following work-up was used. The volatiles
were distilled off in vacuo and the residue was diluted with water
and extracted with dichloromethane (x2). The combined organic
extract was dried over anhydrous sodium sulfate, filtered and
evaporated in vacuo to an oil. Flash column chromatography over
silica gel (230-400 mesh) using 8-10% ethyl acetate in hexane as
the eluent afforded the title compound as a pale yellow oil (0.102
g, 98%).
[0401] .sup.1H-NMR (300 MHz, CDCl.sub.3): .delta. 0.39-0.62 (m,
4H), 1.29(s, 3H), 1.34(s, 3H), 1.42(t, J=6.9 Hz, 3H), 1.65-1.82(m,
2H), 1.85-2.02 (m, 2H), 2.02-2.10(m, 1H), 2.15(s, 3H), 3.97(t,
J=7.7 Hz, 1H), 4.42(q, J=7.0 Hz, 2H), 7.28-7.36 (m, 3H), 7.59(s,
1H), 7.55(d, J=7.9 Hz, 2H), 7.92 (t, J=7.5 Hz, 1H).
[0402] 4-[5-(Cyclopropyl-methyl-amino)-8,8-dimethyl-5
6,7,8-tetrahydro-naphthalene-2-yl-ethynyl]-2-fluoro benzoic acid
(Compound 13, General Formula 4)
[0403] Following general procedure I and using
4-[(5-cyclopropyl-methyl-am-
ino)-8,8-dimethyl-5,6,7,8-tetrahydro-naphthalene-2-ylethynyl]-2-fluoro-ben-
zoic acid ethyl ester (Compound 12, 0.102 g, 0.23 mmol), ethanol (4
mL) and 1 M aqueous sodium hydroxide solution (2 mL) followed by
flash column chromatography over silica gel (230-400 mesh) 30%
ethyl acetate in hexane as the eluent, the title compound was
obtained as an off-white solid(0.015 g, 16%).
[0404] .sup.1H-NMR (300 MHz, CDCl.sub.3): .delta. 0.54-0.65 (m,
4H), 1.29 (s, 3H), 1.32 (s, 3H), 1.68-1.83 (m, 2H), 1.97-2.05 (m,
2H), 2.18-2.25 (m, 1H), 2.25 (s, 3H), 4.13 (t, J=6.7 Hz, 1H),
7.26-7.30 (m, 2H), 7.34 (dd, J=1.5, 7.9 Hz, 1H), 7.48 (d, J=1.8 Hz,
1H), 7.60 (d, J=8.5 Hz, 1H), 7.95 (t, J=7.9 Hz, 1H).
[0405]
[2-Fluoro-4-(8,8-dimethyl-5-oxo-5,6,7,8-tetrahydro-naphthalene-2-yl-
-ethynyl)-phenyl]acetic acid ethyl ester (Compound 14, General
Formula 8) Following general procedure F and using
6-ethynyl-4,4-dimethyl-1,2,3,4-te- trahydro-naphthalene-1-one
(Intermediate 13, 0.298 g, 1.43 mmol), 2-fluoro-4-iodo phenyl
acetic acid ethyl ester (Reagent C, 0.44 g, 1.43 mmol), triethyl
amine (Intermediate 13, 3 mL), anhydrous tetrahydrofuran (7 mL),
copper(I)iodide (0.04 g, 0.2 mmol) and dichlorobis(triphenylphosp-
hine)palladium(II) (0.15 g, 0.213 mmol) followed by flash column
chromatography over silica gel (230-400 mesh) using 14-16% ethyl
acetate in hexane as the eluent, the title compound was obtained as
an oil (0.43 g, 77%).
[0406] .sup.1H-NMR (300 MHz, CDCl.sub.3): .delta. 1.26(t, J=7.2 Hz,
3H), 1.41(s, 6H), 2.04(t, J=6.7 Hz, 2H), 2.74(t, J=6.7 Hz, 2H),
3.68(s, 2H), 4.18(q, J=7.1 Hz, 2H), 7.23-7.57(m, 4H), 7.59 (d,
J=1.5 Hz, 1H), 7.99(d, J=7.9 Hz, 1H).
[2-Fluoro-4-(8.8-dimethyl-5-oxo-5,6,7,8-tetrahydro-naphtha-
lene-2-yl-ethynyl)phenyl]-acetic acid (Compound 15, General Formula
8)
[0407] Following general procedure J and using
[2-fluoro-4-(8,8-dimethyl-5-
-oxo-5,6,7,8-tetrahydro-naphthalene-2-ylethynyl)phenyl]acetic acid
methyl ester (Compound 14, 0.18 g, 0.48 mmol), methanol (4 mL),
tetrahydrofuran (8 mL), water (2 mL) and lithium hydroxide
monohydrate (0.2 g, 4.76 mmol) followed by flash column
chromatography over silica gel (230-400 mesh) using 50-100% ethyl
acetate in hexane as the eluent, the title compound was obtained as
a dirty white solid (0.068 g, 41%).
[0408] .sup.1H-NMR (300 MHz, CDCl.sub.3): .delta. 1.41(s, 6H),
2.03(t, J=6.7 Hz, 2H), 2.74(t, J=6.8 Hz, 2H), 3.73(s, 2H),
7.24-7.32(m, 3H), 7.42(dd, J=1.5, 7.9 Hz, 1H), 7.56 (s, 1H),
7.99(d, J=7.9 Hz, 1 H), 9.40-10.00 (br s, 1 H).
[0409]
[4-(5-(Cyclopropyl-amino)-8.8-dimethyl-5,6,7,8-tetrahydro-naphthale-
ne-2-yl-ethynyl)-2-fluoro-phenyl] acetic acid ethyl ester (Compound
16, General Formula 4)
[0410] Following general procedure G and using
[2-fluoro-4-(8,8-dimethyl-5-
-oxo-5,6,7,8-tetrahydro-naphthalene-2-ylethynyl) phenyl]acetic acid
ethyl ester (Compound 14, 0.258 g, 0.68 mmol), dichloromethane (4
mL), acetonitrile(2 mL), cyclopropyl amine(1 mL, 14.45 mmol),
acetic acid (1 mL)and sodium cyanoborohydride (0.266 g, 4.23 mmol)
followed by flash column chromatography over silica gel (230-400
mesh) using 16-20-25% ethyl acetate in hexane as the eluent , the
title compound was obtained as a pale yellow oil (0.21 g, 73%).
[0411] .sup.1H-NMR (300 MHz, CDCl.sub.3):.delta. 0.35-0.54 (m, 4H),
1.25(t, J=7.1 Hz, 3H), 1.26(s, 3H), 1.32(s, 3H), 1.53-1.64(m, 1H),
1.82-2.05 (m, 3H), 2.21-2.28(m, 1H), 3.65(s, 2H), 3.78(t, J=5.0 Hz,
1H), 4.17(q, J=7.1 Hz, 2H), 7.19-7.41 (m, 5H), 7.47(d, J=1.5 Hz,
1H).
[0412]
[4-(5-(Cyclopropyl-methyl-amino)-8.8-dimethyl-5,6,7,8-tetrahydro-na-
phthalene-2-yl-ethynyl)-2-fluoro-phenyl]-acetic acid ethyl ester
(Compound 17, General Formula 8)
[0413] Following general procedure H and using
[4-((5-cyclopropyl-amino)-8-
,8-dimethyl-5,6,7,8-tetrahydro-naphthalene-2ylethynyl)-2-fluoro-phenyl]ace-
tic acid ethyl ester (Compound 16, 0.21 g, 0.5 mmol), acetone (5
mL), potassium carbonate (1.13 g, 8.17 mmol) and methyl iodide (0.5
mL, 8 mmol), the following work-up was used. The volatiles were
distilled off in vacuo and the residue was diluted with water and
extracted with dichloromethane (x2). The combined organic extract
was dried over anhydrous sodium sulfate, filtered and evaporated in
vacuo to afford an oil. Flash column chromatography over silica gel
(230-400 mesh) using 8% ethyl acetate in hexane as the eluent
afforded the title compound (0.1 5 g, 69%).
[0414] .sup.1H-NMR (300 MHz, CDCl.sub.3): .delta. 0.39-0.53(m, 4H),
1.27(s, 3H), 1.31 (s, 3H), 1.66-1.81(m, 2H), 1.89-2.05(m, 2H),
2.08-2.13 (m, 1H), 2.13 (s, 3H), 3.62(s, 2H), 3.94 (t, J=8.0 Hz,
1H), 4.16(q, J=7.1 Hz, 2H), 7.20-7.29(m, 4H), 7.44(d, J=1.5 Hz,
1H), 7.51 (d, J=8.2 Hz, 1 h).
[0415]
[4-(5-(Cyclopropyl-methyl-amino)-8,8-dimethyl-5,6,7,8-tetrahydro-na-
phthalene-2-yl-ethynyl)-2-fluoro-phenyl]-acetic acid (Compound 18,
General Formula 4)
[0416] Following general procedure J and using
[4-(5-(cyclopropyl-methyl-a-
mino)-8,8-dimethyl-5,6,7,8-tetrahydro-naphthalene-2-ylethynyl)-2-fluoro-ph-
enyl]-acetic acid ethyl ester (Compound 17, 0.025 g, 0.059 mmol),
methanol (1 mL), tetrahydrofuran (1 mL), water (0.5 mL) and lithium
hydroxide monohydrate (0.060 g, 1.43 mmol), the title compound was
obtained as a white solid (0.023 g, 95%).
[0417] .sup.1H-NMR (300 MHz, CDCl.sub.3):.delta. 0.52-0.54(m, 2H),
0.68-0.70(m, 2H), 1.27(s, 3H), 1.29(s, 3H), 1.63-1.80(m, 2H),
1.95-2.17(m, 2H), 2.19-2.24(m, 1H), 2.24(s, 3H), 3.60(s, 2H),
4.18(t, J=7.7 Hz, 1H), 7.19-7.28(m, 4H), 7.45 (d, J=1.5 Hz, 1H),
7.49(d, J=8.2 Hz, 1H), 8.80-9.20(br s, 1H).
[0418] GENERAL PROCEDURE K:
8,8-Dimethyl-5,6,7,8-tetrahydro-naphthalene-1-- one-2-carboxylic
acid-4-(tert-butoxycarbonylmethyl)phenyl ester Compound 19, General
Formula 8)
[0419] A solution of
4,4-dimethyl-6-trifluoromethylsulfonyloxy-1,2,3,4-tet-
rahydro-naphthalene-1-one (Intermediate 11, 0.14 g, 0.434 mmol),
t-butyl-4-hydroxy-phenyl acetate (Reagent E, 0.14 g, 0.673 mmol),
palladium acetate (0.054 g, 0.24 mmol) and
1,3-bis(diphenylphosphino)prop- ane (0.082 g, 0.2 mmol) in a
mixture of dimethylsulfoxide (1 mL), 1,2-dichloroethane (1.5 mL)
and triethyl amine (1 mL) was heated at 70.degree. C. under an
atmosphere of carbon monoxide overnight. The volatiles were
distilled of in vacuo and the residue was diluted with water and
extracted with diethyl ether (x3). The combined organic extract was
dried over anhydrous magnesium sulfate, filtered and evaporated in
vacuo to an oil which was subjected to flash column chromatography
over silica gel (230-400 mesh) using 15% ethyl acetate in hexane as
the eluent to afford the title compound (0.11 g, 53%).
[0420] .sup.1H-NMR (300 MHz, CDCl.sub.3): .delta. 1.44(s, 3H),
1.44(s, 9H), 1.46 (s, 3H), 2.07(t, J=6.9 Hz, 2H), 2.76(t, J=6.8 Hz,
2H), 3.55(s, 2H), 7.17 (d, J=8.5 Hz, 2H), 7.35(d, J=8.5 Hz, 2H),
8.05-8.13(m, 2H), 8.25 (d, J=1.5 Hz, 1H).
[0421]
8,8-Dimethyl-5-oxo-5,6,7,8-tetrahydro-naphthalene-2-carboxylic
acid-4-(carboxymethyl)phenyl ester (Compound 20, General Formula
8)
[0422] A solution of
8,8-dimethyl-5-oxo-5,6,7,8-tetrahydro-naphthalene-2-c- arboxylic
acid 4-(tert-butoxycarbonylmethyl)phenyl ester (Compound 19, 0.1 g,
0.229 mmol) in dichloromethane (2 mL) was treated with
trifluoroacetic acid (0.85 mL and stirred at ambient temperature
for 2.5 h. The volatiles were distilled off in vacuo and the
residue was diluted with water and extracted with ethyl acetate
(x3). The combined organic phase was dried over anhydrous sodium
sulfate, filtered and evaporated in vacuo to afford a solid which
was subjected to flash column chromatography over silica gel
(230-400 mesh) using ethyl acetate as the eluent to afford the
title compound (0.024 g, 25%).
[0423] .sup.1H-NMR (300 MHz, CDCl.sub.3): .delta. 1.46 (s, 6H),
2.08(t, J=6.7 Hz, 2H), 2.80(t, J=6.7 Hz, 2H), 3.70(s, 2H), 7.20(d,
J=8.5 Hz, 2H), 7.37(d, J=8.5 Hz, 2H), 8.08(dd, J=1.4, 8.2 Hz, 1H),
8.14 (d, J=8.2 Hz, 1H), 8.24 (d, J=1.2 Hz, 1H).
[0424] 5-Methoxy-3,3-dimethyl-indane (Intermediate 15)
[0425] Following general procedure A and using titanium
tetrachloride (5.5 mL,50mmoL), anhydrous dichloromethane (80 mL),
2M solution dimethyl zinc (50 mL) in toluene and a solution of
6-methoxy-indane-1-one (4.05 g, 25 mmol) in dichloromethane (10 mL)
the title compound was obtained as an oil (3.13 g, 71%).
[0426] .sup.1H-NMR (300 MHz, CDCl.sub.3):.delta. 1.37 (s, 6H),
2.04(t, J=7.2 Hz, 2H); 2.94(t, J=7.2 Hz, 2H), 3.89(s, 3H), 6.82(d,
J=2.1 Hz, 1H), 7.28(dd, J=2.1, 7.0 Hz, 1H), 7.35 (d, J=7.0 Hz, 1
H).
[0427] 5-Methoxy-3,3-dimethyl-indane-1-one (Intermediate 16)
[0428] Following general procedure B and using
5-methoxy-3,3-dimethyl indane (Intermediate 15, 3.13 g, 17.78 mmol)
in 20 mL of glacial acetic acid and a solution of chromium trioxide
(3.91 g, 39.1 mmol) in 20 mL of acetic acid and 20 mL of water the
title compound was obtained as a viscous yellow oil (3.3 g,
97%).
[0429] .sup.1H-NMR (300 MHz, CDCl.sub.3):.delta. 1.37 (s, 6H), 2.54
(s, 2H), 3.87(s, 3H), 6.86-6.87 (m, 2H), 7.60 (d, J=7.0 Hz,
1H).
[0430] 6-Methoxy-4,4-dimethyl-1,2,3,4-tetrahydro-isoquinoline-1-one
(Intermediate 17)
[0431] A solution of 5-methoxy-3,3-dimethyl-indane-I-one
(Intermediate 16, 3.3 g, 17.4 mmol) in benzene (50 mL) was treated
with concentrated sulfuric acid (10 mL) and heated to 60.degree. C.
Sodium azide (1.95 g, 30 mmol) was added in small portions and
after the addition was complete, the reaction mixture was heated
further for 4 h. It was then cooled, diluted with water and
extracted with chloroform (x3). The combined organic phase was
dried over anhydrous magnesium sulfate, filtered and evaporated in
vacuo to afford the title compound as a brown solid (3.5 g,
quantitative by weight).
[0432] .sup.1H-NMR (300 MHz, CDCl.sub.3): .delta. 1.31 (s, 6H),
3.28 (s, 2H), 3.83(s, 3H), 6.78 (d, J=2.6 Hz, 1H), 6.82(dd, J=2.6
Hz, 8.5 Hz, 1H), 7.59 (s, 1H), 8.02 (d, J=8.2 Hz, 1H).
[0433] 6-Methoxy-4,4-dimethyl-1,2,3 4-tetrahydro-isoquinoline
(Intermediate 18)
[0434] A solution of
6-methoxy-4,4-dimethyl-1,2,3,4-tetrahydro-isoquinolin- e-1-one
(Intermediate 17, 3.5 g, 17 mmol) in 100 mL of anhydrous
tetrahydrofuran was treated with lithium aluminum hydride (1.3 g,
34.25 mmol) in small portions and the resulting suspension was
refluxed for 3 hours under argon. The reaction mixture was then
cooled in an ice bath and cautiously quenched with saturated
aqueous sodium sulfate solution and the resulting slurry was
filtered and the filter-cake washed well with ethyl acetate. The
filtrate and washings were evaporated in vacuo to a brown oil which
was dissolved in chloroform, the solution was dried over anhydrous
magnesium sulfate, filtered and evaporated in vacuo to afford the
title compound (3.2 g, .about.100%).
[0435] .sup.1H-NMR (300 MHz, CDCl.sub.3): .delta. 1.27 (s, 6H),
2.22 (s, 1H), 2.84 (s, 2H), 3.79 (s, 3H), 3.95 (s, 2H), 6.68(dd,
J=2.4 Hz, 8.3 Hz, 1H), 6.86(d, J=2.4 Hz, 1H), 6.91 (d, J=8.3 Hz,
1H).
[0436]
6-Methoxy-4,4-dimethyl-1,2,3,4-tetrahydro-isoquinoline-2-carbaldehy-
de (Intermediate 19)
[0437] A solution of
6-methoxy-4,4-dimethyl-1,2,3,4-tetrahydro-isoquinolin- e
(Intermediate 18, 3.2 g, 16.7 mmol) in anhydrous dichloromethane
(40 mL) was treated with formic acid (1 mL, 26.5 mmol) followed
1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (3.9 g,
20.34 mmol) and the resulting solution was stirred at ambient
temperature overnight. It was then diluted with chloroform and
washed with water (x1) and brine (x1), dried over anhydrous
magnesium sulfate, filtered and evaporated in vacuo to afford the
title compound as pale brown viscous oil (3.26 g, 90%).
[0438] .sup.1H-NMR (300 MHz, CDCl.sub.3): .delta. 1.28 (s, 6H),
3.32 (s, 0.7H), 3.54 (s, 0.3H), 3.79(s, 3H), 4.54 (s, 0.3H),
4.66(s, 0.7H), 6.71(dd, J=2.6 Hz, 8.2 Hz, 1H), 6.85-6.97(m, 1H),
7.02-7.27(m, 1H), 8.15(s, 0.7H), 8.34(s, 0.3H), 8.40-8.80 (br s,
1H).
[0439]
6-Hydroxy-4,4-dimethyl-1,2,3,4-tetrahydro-isoquinoline-2-carbaldehy-
de (Intermediate 20)
[0440] A stirred, cooled (-78.degree. C.) solution of
6-methoxy-4,4-dimethyl-1,2,3,4-tetrahydro-isoquinoline-2-carbaldehyde
(Intermediate 19, 3.26 g, 15 mmol) in anhydrous dichloromethane (15
mL) was treated with 1M solution of boron tribromide in
dichloromethane (50 mL) stirred at ambient temperature for 3 h. It
was then cooled again to 78.degree. C. and quenched carefully with
saturated aqueous sodium carbonate solution, diluted with water and
the aqueous phase was extracted with ethyl acetate (x2). The
combined organic extract was dried over anhydrous sodium sulfate,
filtered and evaporated in vacuo to afford the title compound as a
solid foam (3 g, 99%).
[0441] .sup.1H-NMR (300 MHz, CDCl.sub.3): .delta. 1.23 (s, 6H),
3.31 (s, 0.7H), 3.54 (s, 0.3H), 4.51 (s, 0.3H), 4.64 (s, 0.7H),
6.70-6.75(m, 1H), 6.84-6.90(m, 2H), 7.50-7.80(br s, 1H), 8.12(s,
0.7H), 8.32(s, 0.3H).
[0442] 2-Cyclopropyl-6-hydroxy-4,4-dimethyl
-1,2,3,4-tetrahydro-isoquinoli- ne (Intermediate 21)
[0443] A stirred, cooled (0.degree. C.)solution of
6-hydroxy-4,4-dimethyl--
1,2,3,4-tetrahydro-isoquinoline-2-carbaldehyde (Intermediate 20,
2.3 g, 11.21 mmol) in anhydrous tetrahydrofuran (40 mL) under argon
was treated with titanium tetra-iso-propoxide (8.28 mL, 28 mmol)
followed by 3M solution of ethyl magnesium bromide in diethyl ether
(18.7 mL) and the reaction mixture was then heated at 55.degree. C.
overnight. It was then cooled in an ice-bath, quenched with
saturated aqueous ammonium chloride solution and extracted with
diethyl ether (x2). The combined organic phase was dried over
anhydrous sodium sulfate, filtered and evaporated in vacuo to
afford a yellow oily solid. Flash column chromatography over silica
gel (230-400 mesh) using 10-20% ethyl acetate in hexane as the
eluent afforded the title compound as a pale yellow solid (1.55 g,
63%).
[0444] .sup.1H-NMR (300 MHz, CD.sub.3COCD.sub.3): .delta.
0.016-0.16(m, 4H), 0.847 (s, 6H), 1.37 (m, 1H), 2.20(s, 2H), 3.25
(s, 2H), 6.22(dd, J=2.4, 8.2 Hz, 1H), 6.41(d, J=2.6 Hz, 1H),
6.47(d, J=8.2 Hz, 1H), 7.62(s, 1H).
[0445]
2-Cyclopropyl-4,4-dimethyl-6-trifluoromethylsulfonyloxy-1,2,3,4-tet-
rahydro-isoquinoline (Intermediate 22)
[0446] Following general procedure C and using
2-cyclopropyl-6-hydroxy-4,4-
-dimethyl-1,2,3,4-tetrahydro-isoquinoline (Intermediate 21, 1.5 g,
6.9 mmol) in anhydrous dichloromethane (30 mL), triethyl amine (1.5
mL, 10.39 mmol) and
[N,N'-bis(trifluoromethylsulfonyl)amino]-5-chloropyridine (2.75 g,
7 mmol) followed by flash column chromatography over silica gel
(230-400 mesh) using 8% ethyl acetate in hexane as the eluent the
title compound was obtained
[0447] (2.23 g, 92%) as oil. .sup.1H-NMR (300 MHz, CDCl.sub.3):
.delta. 0.42-0.54(m, 4H), 1.25(s, 6H), 1.76(m, 1H), 2.62(s, 2H),
3.74(s, 2H), 6.98(dd, J=2.3, 8.4 Hz, 1H), 7.16(d, J=8.2 Hz, 1H),
7.14(d, J=2.3 Hz, 1H).
[0448]
Ethyl-2-cyclopropyl-4,4-dimethyl-1,2,3,4-tetrahydroisoquinoline-6-c-
arboxylate (Intermediate 23)
[0449] Following general procedure K and using
2-cyclopropyl-4,4-dimethyl--
6-trifluoromethylsulfonyloxy-1,2,3,4-tetrahydro-isoquinoline
(Intermediate 22, 1.6 g, 4.6 mmol), palladium acetate (0.127 g,
0.56 mmol), 1,3-bis(diphenylphosphino)propane (0.160 g, 0.39 mmol),
dimethylsulfoxide (2 mL), 1,2-dichloroethane (5 mL), triethyl amine
(2 mL), ethanol (5 mL) and an atmosphere of carbon monoxide
followed by flash column chromatography over silica gel (230-400
mesh) using 10% ethyl acetate in hexane as the eluent the title
compound was obtained as an oil (1 g, 79%).
[0450] .sup.1H-NMR (300 MHz, CDCl.sub.3):.delta. 0.44-0.54(m, 4H),
1.27(s, 6H), 1.38 (t, J=7 Hz, 3H), 1.73(m, 1H), 2.62(s, 2H),
3.76(s, 2H), 4.35 (q, J=7.1 Hz, 2H), 7.04(d, J=7.9 Hz, 1H), 7.74
(dd, J=1.7, 7.9 Hz, 1H), 7.97(d, J=1.8 Hz, 1H).
[0451]
2-Cyclopropyl-6-hydroxymethyl-4,4-dimethyl-1,2,3,4-tetrahydroisogui-
noline (Intermediate 24)
[0452] A stirred cooled (-78.degree. C.)solution of
ethyl-2-cyclopropyl-4,4-dimethyl-1,2,3,4-tetrahydro
isoquinoline-6-carboxylate (Intermediate 23, 1 g, 3.66 mmol) in
anhydrous dichloromethane (20 mL) under argon was treated with a 1M
solution of di-iso-butyl aluminum hydride in dichloromethane (10
mL) and the reaction mixture was warmed to -20.degree. C. over 1 h.
It was then quenched with saturated aqueous ammonium chloride
solution and diluted with dichloromethane and filtered over a bed
of celite. The phases were separated and the aqueous phase was
extracted with dichloromethane (x1). The combined organic extract
was dried over anhydrous sodium sulfate, filtered and evaporated in
vacuo to afford the title compound as a viscous oil (0.74 g,
87%).
[0453] .sup.1H-NMR (300 MHz, CDCl.sub.3): .delta. 0.45-0.53(m, 4H),
1.25(s, 6H), 1.72-1.82(m, 2H), 2.61(s, 2H), 3.73(s, 2H), 4.61 (d,
J=5 Hz, 2H), 6.98(d, J=7.9 Hz, 1H), 7.07 (dd, J=1.5, 7.6 Hz, 1H),
7.27(s, 1H).
[0454] 2-Cyclopropyl-4,4-dimethyl-1
2,3,4-tetrahydroisoquinoline-6-carbald- ehyde (Intermediate 25)
[0455] A solution of
2-cyclopropyl-6-hydroxymethyl-4,4-dimethyl-1,2,3,4-te-
trahydroisoquinoline (Intermediate 24, 0.74 g, 3.2 mmol) in
dichloromethane (10 mL) and acetonitrile (2.5 mL) was treated
sequentially with 4A.degree. molecular sieves powder (1.06 g),
tetra-n-propyl ammonium perruthenate (0.050 g, 0.14 mmol) and
N-methyl morpholine N-oxide (1.1 g, 9.8 mmol). After stirring at
ambient temperature for 0.5 h, it was diluted with 5 mL of hexane
and subjected to flash column chromatography over silica gel
(230-400 mesh) using 10% ethyl acetate in hexane as the eluent to
afford the title compound as an oil (0.27 g, 37%).
[0456] .sup.1H-NMR (300 MHz, CDCl.sub.3):.delta. 0.44-0.56(m, 4H),
1.30(s, 6H), 1.79(m, 1H), 2.66(s, 2H), 3.82(s, 2H), 7.17(d, J=7.9
Hz, 1H), 7.60 (dd, J=1.6, 7.9 Hz, 1H), 7,82(d, J=1.8 Hz, 1H), 9.95
(s, 1H).
6-(2,2-Dibromo-vinyl)-2-cyclopropyl-4,4-dimethyl-1,2,3,4-tetrahydroisoqui-
noline (Intermediate 26)
[0457] A stirred, cooled (ice-bath) solution of triphenyl phosphine
(0.53 g, 2 mmol) in anhydrous dichloromethane was treated with
carbon tetrabromide (0.35 g, 1 mmol) under argon. After 0.5 h, a
solution of
2-cyclopropyl-4,4-dimethyl-1,2,3,4-tetrahydroisoquinoline-6-carboxaldehyd-
e (Intermediate 25, 0.13 g, 0.57 mmol) in dichloromethane (2 mL)
was cannulated into the reaction mixture. After 1.5 h between
0.degree. C. and 10.degree. C., the reaction mixture was subjected
to flash column chromatography over silica gel (230-400 mesh) using
3-5% ethyl acetate in hexane as the eluent to afford the title
compound as a viscous, pale yellow oil (0.1 8 g, 82%).
[0458] .sup.1H-NMR (300 MHz, CDCl.sub.3):.delta. 0.49-0.57(m, 4H),
1.31(s, 6H), 1.80(m, 1H), 2.67(s, 2H), 3.77(s, 2H), 7.04(d, J=7.9
Hz, 1H), 7.29 (dd, J=1.7, 7.9 Hz, 1H), 7.49 (s, 1H), 7.50(d, J=1.7
Hz, 1H).
[0459]
2-Cyclopropyl-6-ethynyl-4,4-dimethyl-1,2,3,4-tetrahydroisoquinoline
(Intermediate 27)
[0460] A stirred, cooled (-78.degree. C.) solution of
6-(2,2-dibromo-vinyl)-2-cyclopropyl-4,4-dimethyl-1,2,3,4-tetrahydroisoqui-
noline-6-carboxaldehyde (Intermediate 26, 0.18 g, 0.47 mmol) in
tetrahydrofuran (2 mL) was treated with 1.6M solution of n-butyl
lithium (0.6 mL, 0.96 mmol) under argon. The reaction mixture was
allowed to warm to -20.degree. C. over 1.5 h, quenched with
saturated aqueous ammonium chloride solution and extracted with
diethyl ether (x2). The combined organic phase was dried over
anhydrous magnesium sulfate, filtered and evaporated in vacuo to
afford the title compound as an oil (0.1 g, 94%).
[0461] .sup.1H-NMR (300 MHz, CDCl.sub.3):.delta. 0.47-0.55(m, 4H),
1.28(s, 6H), 1.77(m, 1H), 2.63(s, 2H), 3.05(s, 1H), 3.67(s, 2H),
6.98(d, J=7.6 Hz, 1H), 7.26 (dd, J=1.5, 7.9 Hz, 1H), 7.46(d, J=1.5
Hz, 1H).
[0462] [4-(2-Cyclopropyl-4,4-dimethyl-1
2,3,4-tetrahydro-isoquinoline-6-yl-
-ethynyl)-2-fluoro-phenyl]-acetic acid ethyl ester (Compound 21,
General Formula 3)
[0463] Following general procedure F and using
2-cyclopropyl-6-ethynyl-4,4-
-dimethyl-1,2,3,4-tetrahydro-isoquinoline(Intermediate 27, 0.13 g,
0.571 mmol), 2-fluoro-4-iodo phenyl acetic acid ethyl ester
(Reagent C, 0.16 g, 0.52 mmol), triethyl amine (0.8 mL), anhydrous
tetrahydrofuran (2 mL), copper(I)iodide (0.051 g, 0.27 mmol) and
dichlorobis(triphenylphosphine)p- alladium(II) (0.1 g, 0.14 mmol)
followed by flash column chromatography over silica gel (230-400
mesh) using 10% ethyl acetate in -hexane as the eluent, 0.1 g of
the title compound was obtained as an oil. It was further purified
by preparative normal phase HPLC on a partisil-10 silica column
using 10% ethyl acetate in hexane as the mobile phase (0.055 g,
24%).
[0464] .sup.1H-NMR (300 MHz, CDCl.sub.3):.delta. 0.42-0.51(m, 4H),
1.26(t, J=7.3 Hz, 3H), 1.27(s, 6H), 1.75(m, 1H), 2.61(s, 2H),
3.66(s, 2H), 3.74(s, 2H), 4.18 (q, J=7.3 Hz, 2H), 6.97 (d, J=7.9
Hz, 1H), 7.20-7.29(m, 4H), 7.45(d, J=1.5 Hz, 1H).
[0465]
[4-(2-Cyclopropyl-4,4-dimethyl-1,2,3,4-tetrahydro-isoquinolin-6-yl--
ethynyl)-2-fluoro-phenyl]-acetic acid (Compound 22, General Formula
3)
[0466] Following general procedure J and using
[4-(2-cyclopropyl-4,4-dimet-
hyl-1,2,3,4-tetrahydro-isoquinolin-6-ylethynyl)-2-fluoro-phenyl]-acetic
acid ethyl ester (Compound 21, 0.055 g, 0.135 mmol), methanol (2
mL), tetrahydrofuran (4 mL), water (1 mL) and lithium hydroxide
monohydrate (0.1 17 g, 2.97 mmol) the title compound was obtained
as a pale yellow solid foam (0.040 g, 78%).
[0467] .sup.1H-NMR (300 MHz, CDCl.sub.3): .delta. 0.52-0.65(m, 4H),
1.27(s, 6H), 1.84(m, 1H), 2.71(s, 2H), 3.61(s, 2H), 3.85(s, 2H),
6.98(d, J=7.9 Hz, 1H), 7.06 (t, J=7.6 Hz, 1H), 7.17-7.25(m, 3H),
7.43(d, J=1.2 Hz, 1H), 8.60-9.00(br s, 1H).
[0468] [4-(2-Cyclopropyl-4,4-dimethyl-1
2,3,4-tetrahydro-isoquinolin-6-yl-- ethynyl)-phenyl]-acetic acid
methyl ester (Compound 23, General Formula 3)
[0469] Following general procedure F and using
2-cyclopropyl-4,4-dimethyl--
6-ethynyl-1,2,3,4-tetrahydro-isoquinoline(Intermediate 27, 0.13 g,
0.571 mmol), 4-iodo phenyl acetic acid methyl ester (Reagent B,
0.16 g, 0.58 mmol), triethyl amine (0.5 mL), anhydrous
tetrahydrofuran (2 mL), copper(I)iodide (0.04 g, 0.21 mmol) and
dichlorobis(triphenylphosphine)pa- lladium(II) (0.12 g, 0.17 mmol)
followed by flash column chromatography over silica gel (230-400
mesh) using 10% ethyl acetate in hexane as the eluent, 0.05 g of
the title compound was obtained as an oil. It was further purified
by preparative normal phase HPLC on a partisil-10 silica column
using 10% ethyl acetate in hexane as the mobile phase (0.01 g,
6%).
[0470] .sup.1H-NMR (300 MHz, CDCl.sub.3): .delta. 0.42-0.58(m, 4H),
1.29(m, 6H), 1.79(m, 1H), 2.64(s, 2H), 3.67(s, 3H), 3.72(s, 2H),
3.77(s, 2H), 7.09 (d, J=7.9 Hz, 1H), 7.28(dd, J=1.5, 7.9 Hz, 1H),
7.36 (d, J=7.9 Hz, 2H), 7.50 (d, J=1.6 Hz, 1H), 7.51(d, J=7.9 Hz,
2H).
[0471]
[4-(2-Cyclopropyl-4,4-dimethyl-1,2,3,4-tetrahydro-isoquinolin-6-yl--
ethynyl)-phenyl]-acetic acid (Compound 24, General Formula 3)
[0472] Following general procedure J and using
[4-(2-cyclopropyl-4,4-dimet-
hyl-1,2,3,4-tetrahydro-isoquinolin-6ylethynyl)-phenyl]-acetic acid
methyl ester (Compound 23, 0.01 g, 0.027 mmol), methanol (1 mL),
tetrahydrofuran (1 mL), water (0.5 mL) and lithium hydroxide
monohydrate (0.042 g, 1 mmol) the title compound was obtained as a
pale yellow solid foam (0.0065 g, 68%).
[0473] .sup.1H-NMR (300 MHz, CDCl.sub.3): .delta. 0.35-0.52(m, 4H),
1.24(s, 6H), 1.74(m, 1H), 2.59(s, 2H), 3.64(s, 2H), 3.71(s, 2H),
7.03 (d, J=8.2 Hz, 1H), 7.22(dd, J=1.4, 7.9 Hz, 1H), 7.33 (d, J=8.2
Hz, 2H), 7.46 (d, J=8.2 Hz, 2H), 7.47(s, 1H).
[0474]
1-(Iso-propyl-methyl-amino)-6-trimethylsilanylethynyl-4,4-dimethyl--
1,2,3,4-tetrahydro-naphthalene (Intermediate 28)
[0475] Following general procedure G and using a solution of
4,4-dimethyl-6-trimethylsilanylethynyl-1,2,3,4-tetrahydro-naphthalene
2-one (Intermediate 12, 0.2 g, 0.78 mmol), dichloromethane (4 mL),
acetonitrile (2 mL), acetic acid (1 mL), isopropyl amine (1 mL,
11.74 mmol) and sodium cyanoborohydride (0. 19 g, 3.02 mmol), after
15days of reaction time and work up afforded an intermediate (0. 14
g, 60%, 0.47 mmol) which was used following general procedure H
along with acetone (2 mL), potassium carbonate (0.6 g, 4.34 mmol)
and methyl iodide (0.5 mL, 8 mmol). The crude product after work up
was subjected to flash column chromatography over silica gel
(230-400 mesh) using 15% ethyl acetate in hexane as the eluent to
afford the title compound as a pale yellow oil (0.14 g, 95%).
[0476] .sup.1H-NMR (300 MHz, CDCl.sub.3): .delta. 0.001(s, 9H),
0.85 (d, J=6.4 Hz, 6H), 0.98 (s, 3H), 1.03 (s, 3H), 1.32-1.60 (m,
4H), 1.81(s, 3H), 2.64(heptet, J=6.4 Hz, 1H), 3.65 (dd, J=6.1, 9.4
Hz, 1H), 6.97 (dd, J=1.7, 7.9 Hz, 1H), 7.13 (d, J=1.7 Hz, 1H), 7.82
(d, J=7.9 Hz, 1H).
[0477]
6-Ethynyl-1-(iso-propyl-methyl-amino)-4,4-dimethyl-1,2,3,4-tetrahyd-
ro-naphthalene (Intermediate 29)
[0478] Following general procedure E and using
1-(methyl-iso-propylamino)--
4,4-dimethyl-6-trimethylsilanylethynyl-1,2,3,4-tetrahydro-naphthalene
(Intermediate 28, 0.14 g, 0.45 mmol), methanol (5 mL), potassium
carbonate (0.61 g, 4.41 mmol) and ethyl acetate the title compound
(0.092 g, 80%) was obtained as an oil.
[0479] .sup.1H-NMR (300 MHz, CDCl.sub.3):.delta. 1.11 (d, J=6.4 Hz,
6H), 1.23(s, 3H), 1.28(s, 3H), 1.51-1.87 (m, 4H), 2.09(s, 3H), 2.90
(heptet, J=6.4 Hz, 1H), 3.00(s, 1H), 3.91 (dd, J=5.8, 10.0 Hz, 1H),
7.25(dd, J=1.7, 8.2 Hz, 1H), 7.41 (d, J=1.7 Hz, 1H), 7.70(d, J=8.2
Hz, 1H).
[0480]
4-[5-(Iso-propyl-methyl-amino)-8,8-dimethyl-5,6,7,8-tetrahydro-naph-
thalene-2-yl-ethynyl)]-benzoic acid ethyl ester (Compound 25,
General Formula 4)
[0481] Following general procedure F and
6-ethynyl-1-(iso-propyl-methyl-am-
ino)-4,4-dimethyl-1,2,3,4-tetrahydro-naphthalene (Intermediate 29,
0.092 g, 0.36 mmol), ethyl-4-iodo benzoate (Reagent A, 0.12 g, 0.48
mmol), triethyl amine (1 mL), tetrahydrofuran (2 mL),
copper(I)iodide (0.028 g, 0.14 mmol) and
dichlorobis(triphenylphosphine)palladium(II) (0.075 g, 0.11 mmol)
followed by flash column chromatography over silica gel (230-400
mesh) using 10-15% ethyl acetate in hexane as the eluent the title
compound was obtained (0.04 g, 27%).
[0482] .sup.1H-NMR (300 MHz, CDCl.sub.3): .delta. 1.12 (d, J=6.5
Hz, 6H), 1.27 (s, 3H), 1.31 (s, 3H), 1.40 (t, J=7.0 Hz, 3H),
1.62-1.89 (m, 4H), 2.1 0(s, 3H), 2.92 (heptet, J=6.4 Hz, 1H),
3.94(dd, J=6.1, 9.7 Hz, 1H), 4.38(q, J=7. 1 Hz, 2H), 7.3 1(dd,
J=1.4, 8.2 Hz, 1H), 7.46 (d, J=1.7 Hz, 1H), 7.58 (d, J=8.2 Hz, 2H),
7.75(d, J=8.2 Hz, 1 H), 8.01 (d, J=8.2 Hz, 2H).
[0483] 4-[5-(Iso-propyl-methyl-amino)-8,8-dimethyl-5
6,7,8-tetrahydro-naphthalene-2-yl-ethynyl)]-benzoic acid (Compound
26, General Formula 4)
[0484] Following general procedure I and using
4-[5-(iso-propyl-methyl-ami-
no)-8,8-dimethyl-5,6,7,8-tetrahydro-naphthalene-2-ylethynyl)]-benzoic
acid ethyl ester (Compound 25, 0.04 g, 0.01 mmol), ethanol (2 mL),
tetrahydrofuran (1 mL) and 1 M aqueous sodium hydroxide solution (1
mL) followed by recrystallization from diethylether-hexane, the
title compound was obtained as an off-white solid (0.010 g,
27%).
[0485] .sup.1H-NMR (300 MHz, CDCl.sub.3): .delta. 1.30(d, J=6.0 Hz,
6H), 1.31(s, 9H), 1.67-1.98(m, 4H), 2.35 (s, 3H), 3.19 (heptet,
J=6.4 Hz, 1H), 4.36 (t, J=7.6 Hz, 1H), 7.28(dd, J=, 1.4, 8.2 Hz,
1H), 7.48 (d, J=1.4 Hz, 1H), 7.55 (d, J=8.2 Hz, 2H), 7.81 (d, J=8.2
Hz, 1H), 8.05 (d, J=8.2 Hz, 2H).
[0486] [4-(2,2,4,4-Tetramethyl-chroman-6-yl-ethynyl) phenyl] acetic
acid methyl ester (Compound 27, General Formula 8)
[0487] Following general procedure F and using
6-ethynyl-2,2,4,4-tetrameth- ylchroman (synthesis described in U.S.
Pat. Nos. 5,045,551 and 5,616,597 incorporated herein by reference)
(0.060 g, 0.28 mmol), methyl-4-iodo phenyl acetate (Reagent B,
0.078 g, 0.28 mmol), triethyl amine (4 mL), tetrahydrofuran (4 mL),
copper(I)iodide (0.030 g, 0.16 mmol) and
dichlorobis(triphenylphosphine)palladium(II) (0.11 g, 0.16 mmol)
followed by flash column chromatography over silica gel (230-400
mesh) using 5-10% ethyl acetate in hexane as the eluent the title
compound was obtained (0.047 g, 46%).
[0488] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.48-7.45 (m,
3H), 7.25-7.23 (m, 3H), 6.75 (d, 1H, J=8.2 Hz), 3.70 (s, 3H), 3.62
(s, 2H), 1.84 (s, 2H), 1.36 (s, 6H), 1.35 (s, 6H).
[0489] GENERAL PROCEDURE L:
[4-(2,2,4,4-Tetramethyl-chroman-6-yl-ethynyl) phenyl] acetic acid
(Compound 28, General Formula 8)
[0490] A solution of [4-(2,2,4,4-tetramethyl-chroman-6-yl-ethynyl)
phenyl] acetic acid methyl ester (Compound 27, 0.047 g, 0.13 mmol)
in 5 mL of methanol was treated with 1 M sodium hydroxide solution
(2 mL) and heated at 55.degree. C. for 2 h. The volatiles were
distilled off in vacuo and the residue was acidified with 10%
hydrochloric acid and extracted with ethyl acetate (x2). The
combined organic phase was washed with brine (x1), dried over
anhydrous sodium sulfate, filtered and evaporated in vacuo to a
residue which was purified by preparative reverse phase HPLC using
10% water in acetonitrile as the mobile phase to afford the title
compound (0.034 g, 82%). .sup.1H NMR (300 MHz, CDCl.sub.3): .delta.
7.49-7.45 (m, 3H), 7.26-7.22 (m, 3H), 6.75 (d, 1H, J=8.2 Hz), 3.65
(s, 2H), 1.84 (s, 2H), 1.36 (s, 6H), 1.35 (s, 6H).
[0491]
2-Fluoro-4-(2,2,4,4-tetramethyl-chroman-6-yl-ethynyl)-benzoic acid
methyl ester (Compound 29, General Formula 8)
[0492] Following general procedure F and using
6-ethynyl-2,2,4,4-tetrameth- ylchroman (0.11 g, 0.51 mmol),
methyl-2-fluoro-4-iodo-benzoate (Reagent G, 0. 14 g, 0.51 mmol),
triethyl amine (5 mL), tetrahydrofuran(10 mL),
copper(I)iodide(0.030 g, 0.16 mmol) and
dichlorobis(triphenylphosphine)pa- lladium(II) (0.110 g, 0.16 mmol)
followed by flash column chromatography over silica gel (230-400
mesh) using 5-10% ethyl acetate in hexane as the eluent, the title
compound was obtained (0. 14 g, 79%). .sup.1H NMR (300 MHz,
CDCl.sub.3): .delta. 7.82 (t, 1H, J=7.9 Hz), 7.39 (d, 1H, J=1.8
Hz), 7.25-7.16 (m, 3H), 6.69 (d, 1H, J=8.2 Hz), 3.85 (s, 3H), 1.77
(s, 2H), 1.29 (s, 6H), 1.28 (s, 6H).
[0493]
2-Fluoro-4-(2,2,4,4-tetramethyl-chroman-6-yl-ethynyl)-benzoic acid
(Compound 30, General Formula 8)
[0494] Following general procedure L and using
2-fluoro-4-(2,2,4,4-tetrame- thyl-chroman-6-yl-ethynyl)-benzoic
acid methyl ester (Compound 29, 0.14 g, 0.4 mmol), 5 mL of methanol
and 1M sodium hydroxide solution (2 mL) followed by
recrystallization from ethyl acetate, the title compound was
obtained (0.083 g, 58%).
[0495] .sup.1H NMR (300 MHz, CD.sub.3COCD.sub.3): .delta. 8.00 (t,
1H, J=7.8 Hz), 7.63 (d, 1H, J=2.1 Hz), 7.45 (dd, 1H, J=1.5, 7.9
Hz), 7.38 (dd, 1H, J=1.5, 11.4 Hz), 7.32 (dd, 1H, J=2.1, 8.2 Hz),
6.81 (d, 1H, J=8.5 Hz), 1.92 (s, 2H), 1.41 (s, 6H), 1.38 (s,
6H).
[0496] [2-Fluoro-4-(2,2,4,4-tetramethyl-chroman-6-yl-ethynyl)
phenyl] acetic acid ethyl ester (Compound 31, General Formula
8)
[0497] Following general procedure F and using
6-ethynyl-2,2,4,4-tetrameth- ylchroman (0.204 g, 0.95 mmol),
ethyl-2-fluoro-4-iodo phenyl acetate (Reagent C, 0.263 g, 0.86
mmol), triethyl amine, tetrahydrofuran, copper(I)iodide (0.025 g,
0.13 mmol) and dichlorobis(triphenylphosphine)p- alladium(II)
(0.075 g, 0.11 mmol) followed by flash column chromatography over
silica gel (230-400 mesh) using 5-10% ethyl acetate in hexane as
the eluent, the title compound was obtained (0.21 g, 62%).
[0498] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.46 (d, 1H,
J=2.1 Hz), 7.25-7.21 (m, 4H), 6.69 (d, 1H, J=8.5 Hz), 4.16 (q, 2H,
J=7.1 Hz), 3.65 (s, 2H), 1.82 (s, 2H), 1.35 (s, 6H), 1.35 (s, 6H),
1.24 (t, 3H, J=7.2 Hz).
[0499] [2-Fluoro-4-(2,2,4,4-tetramethyl-chroman-6-yl-ethynyl)
phenyl] acetic acid (Compound 32, General Formula 8)
[0500] Following general procedure L and using
[2-fluoro-4-(2,2,4,4-tetram- ethyl-chroman-6-ylethynyl)phenyl]
acetic acid ethyl ester (Compound 31, 0.21 g, 0.58 mmol), 5 mL of
methanol and 1M sodium hydroxide solution (2 mL) followed by flash
column chromatography over silica gel (230-400 mesh) using 50%
ethyl acetate in hexane, the title compound was obtained as a solid
(0.184 g, 93%).
[0501] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 11.40 (br s, 1H),
7.48 (d, 1H, J=1.8 Hz), 7.46-7.16 (m, 4H), 6.76 (d, 1H, J=8.2 Hz),
3.69 (s, 2H), 1.82 (s, 2H), 1.34 (s, 12H).
[0502] 3-Methyl-but-2-enoic acid 4-bromo-phenyl ester:
[0503] To a stirred, cooled (ice bath) suspension of sodium hydride
(2.4 g, 100 mmol) in anhydrous tetrahydrofuran (200 mL), 4-bromo
phenol (17.3 g, 100 mmol) was added followed by 3,3,-dimethyl
acryloyl chloride (11. 14 mL, 100 mmol). After 4 hours at ambient
temperature, the reaction mixture was poured into brine and
extracted with diethyl ether (x2). The combined organic phase was
dried over anhydrous sodium sulfate, filtered and evaporated in
vacuo to afford an oil which was subjected to flash column
chromatography over silica gel (230-400 mesh) using 2% ethyl
acetate in hexane as the eluent to afford the title compound (15 g,
59%).
[0504] .sup.1H-NMR (300 MHz, CDCl.sub.3):.delta. 2.00(s, 3H),
2.23(s, 3H), 5.89(s, 1H), 7.00(d, J=8.8 Hz, 2H), 7.49(d, J=8.8 Hz,
2H).
[0505] 6-Bromo-4,4-dimethyl-chroman-2-one:
[0506] A solution of 3-methyl-but-2-enoic acid 4-bromo-phenyl ester
(7 g, 27.6 mmol) in anhydrous dichloromethane (200 mL) was cooled
(ice bath) and treated with aluminum chloride (6.6 g, 49.6 mmol)
and the reaction mixture was stirred overnight at ambient
temperature. The reaction mixture was quenched with saturated
aqueous sodium bicarbonate solution and extracted with diethyl
ether (x2). The combined organic extract was washed woth brine
(x1), dried over anhydrous sodium sulfate, filtered and evaporated
in vacuo to afford an oil which was purified by flash column
chromatography over silica gel (230-400 mesh) using 2.5% ethyl
acetate in hexane as the eluent to afford the title compound (4.2
g, 57%).
[0507] .sup.1H-NMR (300 MHz, CDCl.sub.3):.delta. 1.36(s, 6H),
2.62(s, 2H), 6.95(d, J=8.5 Hz, 1H), 7.37(dd, J=2.4, 8.5 Hz, 1H),
7.43(d, J=2.3 Hz, 1H).
[0508] 4-Bromo-2-(3-hydroxy-1,1,3-trimethyl-butyl)-phenol:
[0509] A solution of 6-bromo-4,4-dimethyl-chroman-2-one (1 g, 3.92
mmol) in anhydrous tetrahydrofuran (20 mL) was treated with 3M
solution of ethyl magnesium bromide (2.6 mL) and stirred at ambient
temperature for 2 hours. The reaction mixture was poured into cold
dilute hydrochloric acid and extracted with ethyl acetate (x2). The
combined organic extract was dried over anhydrous sodium sulfate,
filtered and evaporated in vacuo to afford a residue which was
subjected to flash column chromatography over silica gel (230-400
mesh) using 10% ethyl acetate in hexane as the eluent to afford the
title compound as a pale yellow solid (1.1 g, 100%).
[0510] .sup.1H-NMR (300 MHz, CDCl.sub.3):.delta. 1.14(s, 6H),
1.44(s, 6H), 2.20(s, 2H), 6.49(d, J=8.4 Hz,1H), 7.15(dd, J=2.4, 8.5
Hz, 1H), 7.37(d, J=2.4 Hz, 1H).
[0511] 6-Bromo-2,2,4,4-tetramethyl-chroman:
[0512] A solution of
4-bromo-2-(3-hydroxy-1,1,3-trimethyl-butyl)-phenol (1.1 g, 3.92
mmol) and p-toluene sulfonic acid (0.744 g, 3.92 mmol) in benzene
(20 mL) was refluxed overnight. The reaction mixture cooled to
ambient temperature, filtered on silica gel and washed with 10%
ethyl acetate in hexane. The filtrate and washings were evaporated
in vacuo to an oil which was subjected to flash column
chromatography over silica gel (230-400 mesh) using 5% ethyl
acetate in hexane as the eluent to afford the title compound as a
pale yellow oil (0.84 g, 80%).
[0513] .sup.1H-NMR (300 MHz, CDCl.sub.3):.delta. 1.34(s, 6H),
1.35(s, 6H), 1.82(s, 2H), 6.68(d, J=8.4 Hz, 1H), 7.16(dd, J=2.7,
8.7 Hz, 1H), 7.37(d, J=2.6 Hz, 1H).
[0514] The synthesis of this compound, as described here, is in
close analogy to the synthesis of
6-bromo-2,2,4,4-tetramethylthiochroman, as described in U.S. Pat.
No. 5,045,551
[0515] 2,2,4,4-tetramethyl-6-(2-trimethylsilyl)ethynyl chroman:
[0516] Following general procedure D and using
6-bromo-2,2,4,4-tetramethyl chroman (0.5 g, 1.87 mmol), triethyl
amine (5 mL), anhydrous tetrahydrofuran (15 mL),copper(I)iodide
(0.107 g, 0.156 mmol), trimethylsilyl acetylene (1.84 g, 18.7 mmol)
and dichlorobis(triphenylpho- sphine)palladium(II) (0.39 g, 0.56
mmol) the title compound was obtained as a brown oil (0.61 g,
100%).
[0517] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.43 (d, 1H,
J=2.1 Hz), 7.23 (dd, 1H, J=7.9, 2.1 Hz), 6.73 (d, 1H, J=8.2 Hz),
1.83 (s, 2H), 1.36 (s, 12H), 0.28 (s, 9H).
[0518] 6-Ethynyl-2,2,4,4-tetramethyl chroman:
[0519] Following general procedure E and using
2,2,4,4-tetramethyl-6-(2-tr- imethylsilyl)ethynyl chroman (0.61 g,
1.87 mmol), potassium carbonate (1.9 g, 13.74 mmol) and methanol
the title compound was obtained (0.4 g, 90%).
[0520] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.47 (d, 1H,
J=2.1 Hz), 7.24 (dd, 1H, J=7.9, 2.1 Hz), 6.76 (d, 1H, J=8.2 Hz),
3.01 (s, 1H), 1.85 (s, 2H), 1.37 (s, 6H), 1.36 (s, 6H).
[0521] An alternative synthesis for this compound is described in
U.S. Pat. Nos. 5,045,551 and 5,616,597
[0522] GENERAL PROCEDURE M:
6-Bromo-2,2,4,4-tetramethyl-chroman-8-carbalde- hyde (Intermediate
30)
[0523] A stirred, cooled (ice bath) solution of
6-bromo-2,2,4,4-tetramethy- l chroman, (0.5 g, 1.865 mmol) in
anhydrous dichloromethane (5 mL) was treated with a 1M solution
(1.86 mL, 1.86 mmol) of titanium tetrachloride in dichloromethane
followed by .alpha.,.alpha.-dichloro methyl ether (0.214 g, 1.865
mmol). The reaction mixture was allowed to warm to ambient
temperature for 4 h. The reaction mixture was diluted with diethyl
ether, washed with brine (x1) and dried over anhydrous sodium
sulfate, filtered and evaporated in vacuo to a residue which was
subjected to flash column chromatography over silica gel (230-400
mesh) using 5% ethyl acetate in hexane to afford the title compound
as a yellow solid (0.52 g, 94%).
[0524] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 10.38 (s, 1H),
7.72 (d, 1H, J=2.6 Hz), 7.57 (d, 1H, J=2.6 Hz), 1.88 (s, 2H), 1.41
(s, 6H), 1.36 (s, 6H).
[0525] GENERAL PROCEDURE N: 6-Bromo-8-vinyl -2,2,4,4-tetramethyl-
chroman (Intermediate 31)
[0526] A solution of methylidene triphenyl phosphorane [generated
from methyl triphenylphosphonium bromide (7 g, 20 mmol) and (11.8
mL, 19 mmol) of a 1.6M solution of n-butyl lithium in hexanes ] was
added 6-bromo-2,2,4,4-tetramethyl chroman-8-carbaldehyde
(Intermediate 30, 0.52 g, 1.75 mmol). After 1 h the reaction
mixture was diluted with hexane, washed with brine (x1), dried over
anhydrous sodium sulfate, filtered and evaporated in vacuo to a
clear oil which was subjected to flash column chromatography over
silica gel (230-400 mesh) using 2% ethyl acetate in hexane as the
eluent to afford the title compound as a clear oil (0.37 g,
72%).
[0527] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.46 (d, 1H,
J=2.5 Hz), 7.33 (d, 1H, J=2.5 Hz), 7.03 (dd, 1H, J=11.3, 17.9 Hz),
5.75 (dd, 1H, J=1.4, 17.9 Hz), 5.30 (dd, 1H, J=1.4, 11.3 Hz), 1.85
(s, 2H), 1.39 (s, 6H), 1.37 (s, 6H).
[0528] GENERAL PROCEDURE O:
6-Bromo-8-cyclopropyl-2,2,4,4-tetramethyl chroman (Intermediate
32)
[0529] A stirred, cooled (-30.degree. C.) solution of
6-bromo-8-vinyl-2,2,4,4-tetramethyl chroman (Intermediate 31, 0.37
g, 1.26 mmol) in diethyl ether was treated with a solution of
diazomethane in diethyl ether and catalytic amount of palladium
(II)acetate (30mg). The reaction mixture was allowed to warm to
ambient temperature and subjected to flash column chromatography
over silica gel (230-400 mesh) using 2% ethyl acetate in hexane as
the eluent to afford the title compound as a clear, pale yellow oil
(0.376 g, 97%).
[0530] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.17 (d, 1H,
J=2.3 Hz), 6.73 (d, 1H, J=2.6 Hz), 2.19-2.16 (m, 1H), 1.83 (s, 2H),
1.37 (s, 6H), 1.33 (s, 6H), 0.94-0.88 (m, 2H), 0.64-0.59 (m,
2H).
[0531] 8-Cyclopropyl-6-trimethylsilanylethynyl-2,2,4,4-tetramethyl
chroman (Intermediate 33)
[0532] Following general procedure D and using
6-bromo-8-cyclopropyl-2,2,4- ,4-tetramethyl chroman (Intermediate
32, 0.376 g, 1.22 mmol), (trimethylsilyl)acetylene (4 mL, 28 mmol),
triethyl amine (3 mL), anhydrous tetrahydrofuran (5 mL),
copper(I)iodide (0.025 g, 0.13 mmol) and
dichlorobis(triphenylphosphine)palladium(II) (0.075 g, 0.11 mmol),
the title compound was obtained as an oil (0.173 g, 43%).
[0533] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.36 (d, 1H,
J=2.2 Hz), 6.90 (d, 1H, J=1.9 Hz), 2.31-2.22 (m, 1H), 1.96 (s, 2H),
1.49 (s, 6H), 1.46 (s, 6H), 1.05-0.88 (m, 2H), 0.78-0.72 (m, 2H),
0.37 (s, 9H).
[0534] 8-Cyclopropyl-6-ethynyl-2,2,4,4-tetramethyl chroman
(Intermediate 34)
[0535] Following general procedure E and using
8-cyclopropyl-6-trimethylsi- lanylethynyl-2,2,4,4-tetramethyl
chroman (Intermediate 33, 0.17 g, 0.68 mmol), methanol and
potassium carbonate (0.2 g, 1.47 mmol) the title compound was
obtained as an oil (0.064 g, 47%).
[0536] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.38 (d, 1H,
J=1.9 Hz), 6.92 (d, 1H, J=1.9 Hz), 3.08 (s, 1H), 2.32-2.23 (m, 1H),
1.96 (s, 2H), 1.50 (s, 6H), 1.46 (s, 6H), 1.05-0.99 (m, 2H),
0.77-0.72 (m, 2H).
[0537]
4-(8-Cyclopropyl-2,2,4,4-tetramethyl-chroman-6-yl-ethynyl)-benzoic
acid ethyl ester (Compound 33, General Formula 8)
[0538] Following general procedure F and using
8-cyclopropyl-6-ethynyl-2,2- ,4,4-tetramethylchroman (Intermediate
34, 0.1 g, 0.38 mmol), ethyl-4-iodo-benzoate (Reagent A, 0.1 g,
0.34 mmol), triethyl amine (5 mL), tetrahydrofuran( 1 0 mL),
copper(I)iodide(0.025 g, 0.13 mmol) and
dichlorobis(triphenylphosphine)palladium(II) (0.075 g, 0.11 mmol)
followed by flash column chromatography over silica gel (230-400
mesh) using 5-10% ethyl acetate in hexane as the eluent, the title
compound was obtained (0.13 5 g, 89%).
[0539] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 8.00 (d, 2H,
J=8.2 Hz), 7.55 (d, 2H, J=8.2 Hz), 7.30 (d, 1H, J=1.8 Hz), 6.84 (d,
1H, J=2.0 Hz), 4.38 (q, 2H, J=6.9 Hz), 2.22-2.12 (m, 1H), 1.85 (s,
2H), 1.40 (t, 3H, J=6.9 Hz), 1.38 (s, 6H), 1.36 (s, 6H), 0.92-0.88
(m, 2H), 0.67-0.62 (m, 2H).
[0540]
4-(8-Cyclopropyl-2,2,4,4-tetramethyl-chroman-6-yl-ethynyl)-benzoic
acid (Compound 34, General Formula 8)
[0541] Following general procedure L and using
4-(8-cyclopropyl-2,2,4,4-te-
tramethyl-chroman-6-yl-ethynyl)-benzoic acid ethyl ester (Compound
33, 0.135 g, 0.34 mmol), 5 mL of methanol and 1M sodium hydroxide
solution (2 mL) followed by preparative reverse phase HPLC using
10% water in acetonitrile as the mobile phase, the title compound
was obtained as a solid (0.093 g, 73%).
[0542] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 11.26 (br s, 1H),
8.08 (d, 2H, J=8.2 Hz), 7.59 (d, 2H, J=8.2 Hz), 7.31 (d, 1H, J=1.8
Hz), 6.85 (d, 1H, J=2.1 Hz), 2.22-2.13 (m, 1H), 1.85 (s, 2H), 1.38
(s, 6H), 1.36 (s, 6H), 0.95-0.87 (m, 2H), 0.68-0.63 (m, 2H).
[0543] [4-(8-Cyclopropyl-2,2,4,4-tetramethyl-chroman-6-yl-ethynyl)
phenyl] acetic acid methyl ester (Compound 35, General Formula
8)
[0544] Following general procedure F and using
8-cyclopropyl-6-ethynyl-2,2- ,4,4-tetramethylchroman (Intermediate
34, 0.096 g, 0.38 mmol), methyl-4-iodo phenyl acetate (Reagent B,
0.094 g, 0.34 mmol), triethyl amine (3 mL), tetrahydrofuran (3 mL),
copper(I)iodide (0.025 g, 0.13 mmol) and
dichlorobis(triphenylphosphine)palladium(II) (0.075 g, 0.11 mmol)
the title compound was obtained (0.137 g, 90%). .sup.1H NMR (300
MHz, CDCl.sub.3): .delta. 7.47 (d, 2H, J=7.9 Hz), 7.29 (d, 1H,
J=1.8 Hz), 7.24 (d, 2H, J=7.9 Hz), 6.82 (d, 1H, J=2.1 Hz), 3.70 (s,
31H), 3.63 (s, 2H), 2.22-2.13 (m, 1H), 1.85 (s, 2H), 1.38 (s, 6H),
1.36 (s, 6H), 0.94-0.86 (m, 2H), 0.68-0.63 (m, 2H).
[0545] [4-(8-Cyclopropyl-2,2,4,4-tetramethyl-chroman-6-yl-ethynyl)
phenyl] acetic acid (Compound 36, General Formula 8)
[0546] Following general procedure L and using
[4-(8-cyclopropyl-2,2,4,4-t- etramethyl-chroman-6-ylethynyl)phenyl]
acetic acid methyl ester (Compound 35, 0.137 g, 0.30 mmol), 5 mL of
methanol and 1M sodium hydroxide solution (2 mL) followed by
preparative reverse phase HPLC using 10% water in acetonitrile as
the mobile phase, the title compound was obtained as a solid (0.11
g, 80%).
[0547] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 11.56 (br s, 1H),
7.47 (d, 2H, J=8.9 Hz), 7.28 (d, 1H, J=1.9 Hz), 7.23 (d, 2H, J=8.5
Hz), 6.82 (d, 1H, J=1.9 Hz), 3.62 (s, 2H), 2.21-2.12 (m, 1H), 1.83
(s, 2H), 1.36 (s, 6H), 1.34 (s, 6H), 0.93-0.82 (m, 2H), 0.72-0.62
(m, 2H).
[0548]
[4-(8-Cyclopropyl-2,2,4,4-tetramethyl-chroman-6-yl-ethynyl)-2-fluor-
ophenyl] acetic acid ethyl ester (Compound 37, General Formula
8)
[0549] Following general procedure F and using
8-cyclopropyl-6-ethynyl-2,2- ,4,4-tetramethylchroman (Intermediate
34, 0.096 g, 0.38 mmol), ethyl-2-fluoro-4-iodo phenyl acetate
(Reagent C, 0.104 g, 0.34 mmol), triethyl amine (3 mL),
tetrahydrofuran (3 mL), copper(I)iodide (0.020 g, 0.1 mmol) and
dichlorobis(triphenylphosphine)palladium(II) (0.060 g, 0.085 mmol)
the title compound was obtained (0. 14 g, 85%).
[0550] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.31 (d, 1H,
J=1.9 Hz), 7.29-7.21 (m, 3H), 6.85 (d, 1H, J=1.9 Hz), 4.20 (q, 2H,
J=7.1 Hz), 3.68 (s, 2H), 2.24-2.14 (m, 1H), 1.87 (s, 2H), 1.40 (s,
6H), 1.38 (s, 6H), 1.28 (t, 3H, J=7.1 Hz), 0.96-0.85 (m, 2H),
0.70-0.64 (m, 2H).
[0551]
[4-(8-Cyclopropyl-2,2,4,4-tetramethyl-chroman-6-yl-ethynyl)-2-fluor-
ophenyl] acetic acid (Compound 38, General Formula 8)
[0552] Following general procedure L and using
[4-(8-cyclopropyl-2,2,4,4-t-
etramethyl-chroman-6-yl-ethynyl)-2-fluorophenyl] acetic acid ethyl
ester (Compound 37, 0.14 g, 0.323 mmol), 5 mL of methanol and 1M
sodium hydroxide solution (2 mL) followed by reverse phase HPLC
using 10% water in acetonitrile as the mobile phase, the title
compound was obtained as a solid (0.110 g, 80%).
[0553] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.28 (d, 1H,
J=2.1 Hz), 7.27-7.17 (m, 3H), 6.82 (d, 1HI J=1.8 Hz), 3.70 (s, 2H),
2.21-2.11 (m, 1H), 1.84 (s, 2H), 1.37 (s, 6H), 1.35 (s, 6H),
0.94-0.87 (m, 2H), 0.67-0.62 (m, 2H).
[0554] GENERAL PROCEDURE P: 6-Bromo-4,4-dimethyl-2-methylene
chroman (Intermediate 35)
[0555] A stirred, cooled (ice bath) solution of
6-bromo-4,4-dimethyl-chrom- an-2-one available in accordance with
U.S. Pat. No. 5,399,561 incorporated herein by reference (1 g, 3.92
mmol) in 8 mL of anhydrous tetrahydrofuran was treated with a 0.5 M
solution of .mu.-chloro-.mu.-methylene-[bis(cycl-
opentadienyl)titanium]dimethylaluminum (Tebbe reagent) in toluene
(8.23 mL, 4.12 mmol). After 10 minutes, the reaction mixture was
poured into ice-water mixture containing 50 mL of 1M sodium
hydroxide and extracted with hexane. The hexane extract was washed
with brine (x1), filtered over a bed of celite and evaporated in
vacuo to an oil which was subjected to flash column chromatography
over silica gel (230-400 mesh) using hexane as the eluent to afford
the title compound (0.74 g, 74%) as a clear oil.
[0556] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.34 (d, 1H,
J=2.3 Hz), 7.23 (dd, 1H, J=2.3,8.5 Hz), 6.77 (d, 1H, J=8.0 Hz),
4.61 (d, 1H, J=0.73 Hz), 4.17 (d, 1H, J=0.73 Hz), 2.33 (s, 2H),
1.27 (s, 6H).
[0557] GENERAL PROCEDURE Q:
6-Bromo-3,4-dihydro-4,4-dimethylspiro[2H-1-ben-
zopyran-2H-cyclopropane] (Intermediate 36)
[0558] A solution of diethyl zinc in hexane (1M, 1.7 mL) was
treated with diiodomethane (1.89 g, 7.1 mmol). After 5 minutes, a
solution of 6-bromo-4,4-dimethyl-2-methylene chroman (Intermediate
35, 0.44 g, 1.77 mmol) in 3 mL of hexane was added and the solution
was refluxed for 1 h. The reaction mixture was then cooled to
ambient temperature, diluted with hexane, washed with brine (x1),
dried over anhydrous sodium sulfate, filtered and evaporated in
vacuo to a residue which was subjected to flash column
chromatography over silica gel (230-400 mesh) using hexane as the
eluent to obtain the title compound (0.44 g, 93%).
[0559] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.47 (d, 1H,
J=2.3 Hz), 7.23 (dd, 1H, J=2.3,8.5 Hz), 6.70 (d, 1H, J=8.0 Hz),
1.96 (s, 2H), 1.47 (s, 6H), 1.09-1.05 (m, 2H), 0.74-0.70 (m,
2H).
[0560]
3,4-Dihydro-4,4-dimethyl-6-(trimethylsilanyl)ethynylspiro[2H-1-benz-
opyran-2,1'-cyclopropane] (Intermediate 37)
[0561] Following general procedure D and using
6-bromo-3,4-dihydro-4,4-dim-
ethylspiro[2H-1-benzopyran-2,1'-cyclopropane] (Intermediate 36,
0.44 g, 1.65 mmol), triethyl amine (4 mL), anhydrous
tetrahydrofuran (5 mL), copper(I)iodide (0.95 g, 0.5 mmol),
trimethylsilyl acetylene (1.62 g, 16.5 mmol) and
dichlorobis(triphenylphosphine)palladium(II) (0.4 g, 0.56 mmol),
the title compound was obtained as a brown oil (0.4 g, 86%).
[0562] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.44 (d, 1H,
J=2.1 Hz), 7.18 (dd, 1H, J=2.1,8.5 Hz), 6.65 (d, 1H, J=8.5 Hz),
1.87 (s, 2H), 1.37 (s, 6H), 1.01-0.97 (m, 2H), 0.65-0.61 (m, 2H),
0.26 (s, 9H).
[0563]
6-Ethynyl-3,4-dihydro-4,4-dimethylspiro[2H-1-benzopyran-2,1'-cyclop-
ropane] (Intermediate 38)
[0564] Following general procedure E and using
3,4-dihydro-4,4-dimethyl-6--
(trimethylsilanyl)ethynylspiro[2H-1-benzopyran-2,1'-cyclopropane]
(Intermediate 37, 0.4 g, 1.42 mmol), potassium carbonate (0.98 g,
7.1 mmol) and methanol, the title compound was obtained as a yellow
oil (0.3 g, 100%).
[0565] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.44 (d, 1H,
J=2.1 Hz), 7.18 (dd, 1H, J=2.1, 8.5 Hz), 6.65 (d, 1H, J=8.5 Hz),
2.97 (s, 1H), 1.86 (s, 2H), 1.37 (s, 6H), 1.00-0.95 (m, 2H),
0.64-0.59 (m, 2H).
[0566] Benzoic acid
4-[(3,4-dihydro-4,4-dimethylspiro[2H-1-benzopyran-2,1'-
-cyclopropane]-6-yl)ethynyl]-ethyl ester (Compound 39, General
Formula 1)
[0567] Following general procedure F and using
6-ethynyl-3,4-dihydro-4,4-d-
imethylspiro[2H-1-benzopyran-2,1'-cyclopropane] (Intermediate 38,
0.06 g, 0.28 mmol), ethyl-4-iodo-benzoate (Reagent A, 0.086 g, 0.31
mmol), triethyl amine (4 mL), tetrahydrofuran(4 mL),
copper(I)iodide(0.032 g, 0.17 mmol) and
dichlorobis(triphenylphosphine)palladium(II) (0.11 8 g, 0.17 mmol)
followed by flash column chromatography over silica gel (230-400
mesh) using 5-10% ethyl acetate in hexane as the eluent, the title
compound was obtained (0.07 g, 70%).
[0568] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 8.01 (d, 2H,
J=8.2 Hz), 7.56 (d, 2H, J=8.5 Hz), 7.49 (d, 1H, J=2.1 Hz), 7.24
(dd, 1H, J=2.1,8.5 Hz), 6.70 (d, 1H, J=8.5 Hz), 4.38 (q, 2H, J=7.1
Hz), 1.89 (s, 2H), 1.40 (s, 6H), 1.40 (t, 3H, J=7.0 Hz), 1.02-0.98
(m, 2H), 0.67-0.62 (m, 2H).
[0569] Benzoic acid
4-[(3,4-dihydro-4,4-dimethylspiro[2H-1-benzopyran-2,1'-
-cyclopropane]-6-yl)ethynyl]-(Compound 40, General Formula 1)
[0570] Following general procedure L and using benzoic acid,
4-[(3,4-dihydro-4,4-dimethylspiro[2H-1-benzopyran-2,1'-cyclopropane]-6-yl-
)ethynyl]-ethyl ester (Compound 39, 0.07 g, 0.196 mmol), 5 mL of
ethanol and 1M sodium hydroxide solution (2 mL) followed by
preparative reverse phase HPLC using 10% water in acetonitrile as
the mobile phase, the title compound was obtained as a solid (0.034
g, 52%). .sup.1H NMR (300 MHz, CD.sub.3COCD.sub.3): 8 8.05 (d, 2H,
J=8.2 Hz), 7.64 (d, 2H, J=8.2 Hz), 7.60 (d, 1H, J=2.1 Hz), 7.28
(dd, 1H, J=2.1, 8.5 Hz), 6.73 (d, 1H, J=8.5 Hz), 1.95 (s, 2H), 1.43
(s, 6H), 0.96-0.92 (m, 2H), 0.74-0.71 (m, 2H).
[0571] Benzeneacetic acid
4-[(3,4-dihydro-4,4-dimethylspiro[2H-1-benzopyra-
n-2,1'-cyclopropane]-6-yl)ethynyl]-methyl ester (Compound 41,
General Formula 1)
[0572] Following general procedure F and using
6-ethynyl-3,4-dihydro-4,4-d-
imethylspiro[2H-1-benzopyran-2,1'-cyclopropane] (Intermediate 38,
0.060 g, 0.28 mmol), methyl-4-iodo phenyl acetate (Reagent B, 0.078
g, 0.28 mmol), triethyl amine (4 mL), tetrahydrofuran (4 mL),
copper(I)iodide (0.032 g, 0.17 mmol) and
dichlorobis(triphenylphosphine)palladium(II) (0.1 18 g, 0.17 mmol)
followed by flash column chromatography over silica gel (230-400
mesh) using 5% ethyl acetate in hexane as the eluent, the title
compound was obtained (0.084 g, 84%).
[0573] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.48-7.45 (m,
3H), 7.26-7.20 (m, 3H), 6.67 (d, 1H, J=8.5 Hz), 3.70 (s, 3H), 3.63
(s, 2H), 1.89 (s, 2H), 1.40 (s, 3H), 1.40 (s, 3H), 1.01-0.97 (m,
2H), 0.67-0.61 (m, 2H).
[0574] Benzeneacetic acid,
4-[(3,4-dihydro-4,4-dimethylspiro[2H-1-benzopyr-
an-2,1'-cyclopropane]-6-yl)ethynyl]-(Compound 42, Formula 1)
[0575] A solution of benzeneacetic acid,
4-[(3,4-dihydro-4,4-dimethylspiro-
[2H-1-benzopyran-2,1'-cyclopropane]-6-yl)ethynyl]-methyl ester
(Compound 41, 0.084 g, 0.24 mmol) in 5 mL of methanol was treated
with 1M sodium hydroxide solution (2 mL) and heated at 55.degree.
C. for 2 h. The volatiles were distilled off in vacuo and the
residue was acidified with 10% hydrochloric acid and extracted with
ethyl acetate (x2). The combined organic phase was washed with
brine (x1), dried over anhydrous sodium sulfate, filtered and
evaporated in vacuo to a residue which was purified by preparative
reverse phase HPLC using 10% water in acetonitrile as the mobile
phase to afford the title compound (0.080 g, 100%).
[0576] .sup.1H NMR (300 MHz, CD.sub.3COCD.sub.3): .delta. 7.49-7.46
(m, 3H), 7.25 (d, 2H, J=8.2 Hz), 7.22 (dd, 1H J=2.1,8.5 Hz), 6.68
(d, 1H, J=8.5 Hz), 3.66 (s, 2H), 1.88 (s, 2H), 1.44 (s, 6H),
1.01-0.97 (m, 2H), 0.67-0.61 (m, 2H).
[0577] 2-Fluoro-benzoic acid,
4-[(3,4-dihydro-4,4-dimethylspiro[2H-1-benzo-
pyran-2,1'-cyclopropane]-6-yl)ethynyl]-methyl ester (Compound 43,
General Formula 1)
[0578] Following general procedure F and
6-ethynyl-3,4-dihydro-4,4-dimethy-
lspiro[2H-1-benzopyran-2,1'-cyclopropane] (Intermediate 38, 0.050
g, 0.23 mmol), methyl-2-fluoro-4-iodo-benzoate (Reagent G, 0.069 g,
0.24 mmol), triethyl amine (5 mL), tetrahydrofuran(5 mL),
copper(I)iodide(0.013 g, 0.07 mmol) and
dichlorobis(triphenylphosphine)palladium(II) (0.049 g, 0.07 mmol)
followed by flash column chromatography over silica gel (230-400
mesh) using 5-10% ethyl acetate in hexane as the eluent, the title
compound was obtained (0.080 g, 100%).
[0579] .sup.1H, NMR (300 MHz, CDCl.sub.3): .delta. 7.90 (t, 1H,
J=7.9 Hz), 7.63 (d, 1H, J=1.8 Hz), 7.32 (dd, 1H, J=1.5, 8.2 Hz),
7.26 (dd, 1H, J=1.5,11.4 Hz), 7.24 (dd, 1H, J=2.1, 8.5 Hz), 6.71
(d, 1H, J=8.5 Hz), 1.97 (s, 2H), 1.44 (s, 6H), 0.98-0.94 (m, 2H),
0.76-0.71 (m, 2H).
[0580] 2-Fluoro-benzoic acid,
4-[(3,4-dihydro-4,4-dimethylspiro[2H-1-benzo-
pyran-2,1'-cyclopropane]-6-yl)ethynyl]-(Compound 44, General
Formula 1)
[0581] Following general procedure L and using 2-fluoro-benzoic
acid,
4-[(3,4-dihydro-4,4-dimethylspiro[2H-1-benzopyran-2,1'-cyclopropane]-6-yl-
)ethynyl]-methyl ester (Compound 43, 0.08 g, 0.23 mmol), 5 mL of
methanol and 2M sodium hydroxide solution (1 mL) followed by flash
column chromatography over silica gel (230-400 mesh) using ethyl
acetate as the eluent, the title compound was obtained (0.020 g,
25%).
[0582] .sup.1H NMR (300 MHz, CD.sub.3COCD.sub.3): .delta. 7.99 (t,
1H, J=7.9 Hz), 7.63 (d, 1H, J=2. Hz), 7.44 (dd, 1H, J=1.5, 7.9 Hz),
7.37 (dd, 1H, J=1.5, 11.4 Hz), 7.31 (dd, 1H, J=2.1, 8.5 Hz), 6.75
(d, 1H, J=8.2 Hz), 1.97 (s, 2H), 1.44 (s, 6H), 0.98-0.94 (m, 2H),
0.76-0.71 (m, 2H).
[0583] GENERAL PROCEDURE R:
2,2,4,4-Tetramethyl-chroman-6-carboxylic acid (Intermediate 39)
[0584] A stirred, cooled (-78.degree. C.) solution of
6-bromo-2,2,4,4-tetramethyl chroman (1.2 g, 4.47 mmol) in 1 5 mL of
anhydrous tetrahydrofuran was treated with a 1.7M solution of
tert-butyl lithium solution in pentane (5.27 mL, 8.9 mmol). After
10 minutes at -78.degree. C., carbon dioxide (generated from dry
ice) was bubbled into the reaction mixture. The reaction mixture
was allowed to warm to ambient temperature. The reaction mixture
was diluted with ethyl acetate, washed with brine, dried over
anhydrous sodium sulfate, filtered and evaporated in vacuo to a
residue which was subjected to flash column chromatography over
silica gel (230-400 mesh) using ethyl acetate as the eluent to
afford the title compound as a white solid (1.1 g, 92%).
[0585] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 12.17 (br s, 1H),
8.09 (d, 1H, J=2.1 Hz), 7.85 (dd, 1H, J=2.1, 8.5 Hz), 6.83 (d, 1H,
J=8.2 Hz), 1.87 (s, 2H), 1.39 (s, 6H), 1.37 (s, 6H).
[0586] 2,2,4,4-Tetramethyl-chroman-6-carboxylic acid
4-(tert-butoxycarbonylmethyl)phenyl ester (Compound 45, General
Formula 8)
[0587] A solution of 2,2,4,4-tetramethyl chroman-6-carboxylic acid
(0.1 g, 0.43 mmol) in thionyl chloride (10 mL) was refluxed for 2
h. The thionyl chloride was evaporated under reduced pressure and
the residue was dissolved in 5 mL of dichloromethane and treated
with triethyl amine (5 mL) followed by tert-butyl-4-hydroxy phenyl
acetate (Reagent E, 0.088 g, 0.427 mmol). After 0.5 h, the reaction
mixture was subjected to flash column chromatography over silica
gel (230-400 mesh) using 5-10% ethyl acetate in hexane as the
eluent to afford the title compound (0.1 g, 55%).
[0588] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 8.15 (d, 1H,
J=2.1 Hz), 7.93 (dd, 1H, J=2.1, 8.5 Hz), 7.33 (d, 2H, J=8.8 Hz),
7.16 (d, 2H, J=8.8 Hz), 6.88 (d, 1H, J=8.5 Hz), 3.54 (s, 2H), 1.89
(s, 2H), 1.45 (s, 9H), 1.41 (s, 6H), 1.40 (s, 6H).
[0589] 2,2,4,4-Tetramethyl-chroman-6-carboxylic acid
4-(carboxymethyl)phenyl ester (Compound 46, General Formula 8)
[0590] A solution of 2,2,4,4-tetramethyl-chroman-6-carboxylic acid
4-(tert-butoxycarbonylmethyl)phenyl ester (Compound 45, 0.1 g, 0.23
mmol) was treated with 5 mL of trifluoroacetic acid and stirred at
ambient temperature for 1 h. The trifluoroacetic acid was distilled
off under reduced pressure and the residue was subjected to
preparative reverse phase HPLC using 10% water in acetonitrile as
the mobile phase to afford the title compound as a white solid
(0.045 g, 50%).
[0591] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 8.13 (d, 1H,
J=2.1 Hz), 7.92 (dd, 1H, J=2.3, 8.5 Hz), 7.35 (d, 2H, J=8.8 Hz),
7.17 (d, 2H, J=8.5 Hz), 6.87 (d, 1H, J=8.5 Hz), 3.68 (s, 2H), 1.89
(s, 2H), 1.41 (s, 6H), 1.39 (s, 6H).
6-Bromo-8-carbaldehyde-3,4-dihydro-4,4-dimethylspiro[2H-1-b-
enzopyran-2,1'-cyclopropane] (Intermediate 40)
[0592] Following general procedure M and using
6-bromo-3,4-dihydro-4,4-dim-
ethylspiro[2H-1-benzopyran-2,1'-cyclopropane](Intermediate 36, 2.3
g, 8.65 mmol), anhydrous dichloromethane (25 mL), 1M solution (8.65
mL, 8.65 mmol) of titanium tetrachloride in dichloromethane and
.alpha.,.alpha.-dichloro methyl ether (1.09 g, 9.52 mmol) followed
by flash column chromatography using 10% ethyl acetate in hexane as
the eluent, the title compound was obtained as a yellow solid (2.06
g, 81%).
[0593] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 10.20 (s, 1H),
7.69 (d, 1H, J=2.6 Hz), 7.58 (d, 1H, J=2.6 Hz), 1.92 (s, 2H), 1.40
(s, 6H), 1.09-1.04 (m, 2H), 0.73-0.69 (m, 2H).
[0594] 6-Bromo-3
4-dihydro-4,4-dimethyl-8-vinylspiro[2H-1-benzopyran-2,1'--
cyclopropane] (Intermediate 41)
[0595] Following general procedure N and using A solution of
methylidene triphenyl phosphorane [generated from methyl
triphenylphosphonium bromide (7 g, 20 mmol) and 1.6M solution of
n-butyl lithium in hexanes (11.8 mL, 19 mmol) ],
6-bromo-8-carbonyl-3,4-dihydro-4,4-dimethylspiro[2H-1-benzopy-
ran-2,1'-cyclopropane](Intermediate 40, 2.06 g, 7 mmol) followed by
flash column chromatography over silica gel (230-400 mesh) using
1-2% ethyl acetate in hexane as the eluent, the title compound was
obtained as a clear oil (1.36 g, 66%).
[0596] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.36 (d, 1H,
J=2.3 Hz), 7.28 (d, 1H, J=2.6 Hz), 6.80 (dd, 1H,J=11.1, 17.9 Hz),
5.63 (dd, 1H,J=1.2, 17.9 Hz), 5.19 (dd, 1H, J=1.2, 11.1 Hz), 1.84
(s, 2H), 1.35 (s, 6H), 0.97 (t, 2H, J=6.3 Hz), 0.62 (d, 1H, J=5.3
Hz), 0.60 (d, 1H, J=6.2 Hz).
[0597]
6-Bromo-8-cyclopropyl-3,4-dihydro-4,4-dimethylspiro[2H-1-benzopyran-
-2,1'-cyclopropane] (Intermediate 42)
[0598] Following general procedure 0 and, using A
6-bromo-3,4-dihydro-4,4--
dimethyl-8-vinylspiro[2H-1-benzopyran-2,1'-cyclopropane]
(Intermediate 41, 1.36 g, 4.6 mmol), a solution of diazomethane in
diethyl ether and palladium (II)acetate (30mg) followed by flash
column chromatography over silica gel (230-400 mesh) using hexane
as the eluent, the title compound was obtained as a clear oil (1.38
g, 100%).
[0599] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.19 (d, 1H,
J=2.2 Hz), 6.71 (d, 1H, J=2.2 Hz), 1.99-1.92 (m, 1H), 1.87 (s, 2H),
1.35 (s, 6H), 1.00-0.95 (m, 2H), 0.90-0.82 (m, 2H), 0.65-0.54 (m,
4H).
[0600]
8-Cyclopropyl-3,4-dihydro-4,4-dimethyl-6-(trimethylsilanyl)ethynyls-
piro[2H-1-benzopyran-2,1'-cyclopropane] (Intermediate 43)
[0601] Following general procedure D and
6-bromo-8-cyclopropyl-3,4-dihydro-
-4,4-dimethylspiro[2H-1-benzopyran-2,1'-cyclopropane] (Intermediate
42, 0.74 g, 2.4 mmol), (trimethylsilyl)acetylene (4 mL, 28 mmol),
triethyl amine (8 mL), anhydrous tetrahydrofuran, copper(I)iodide
(0.050 g, 0.26 mmol) and
dichlorobis(triphenylphosphine)palladium(II) (0.15 g, 0.22 mmol),
followed by flash column chromatography over silica gel (230-400
mesh) using 1-2% ethyl acetate in hexane as the eluent, the title
compound was obtained as an oil (0.62 g, 80%).
[0602] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.28 (d, 1H,
J=1.9 Hz), 6.77 (d, 1H, J=1.9 Hz), 2.03-1.94 (m, 1H), 1.91 (s, 2H),
1.40 (s, 6H), 1.05-0.98 (m, 2H), 0.95-0.83 (m, 2H), 0.69-0.59 (m,
4H), 0.27 (s, 9H).
8-Cyclopropyl-6-ethynyl-3,4-dihydro-4,4-dimethylspiro[2H-1-benzopyran-2,1-
'-cyclopropane] (Intermediate 44)
[0603] Following general procedure E, and
8-cyclopropyl-3,4-dihydro-4,4-di-
methyl-6-(trimethylsilanyl)ethynylspiro[2H-1-benzopyran-2,1'-cyclopropane]
(Intermediate 43, 0.62 g, 1.9 mmol), methanol and potassium
carbonate (0.5 g, 3.6 mmol) followed by flash column chromatography
over silica gel (230-400 mesh) using 1-2% ethyl acetate in hexane
as the eluent, the title compound was obtained as an oil (0.5 g,
100%).
[0604] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.30 (d, 1H,
J=1.8 Hz), 6.80 (d, 1H, J=2.0 Hz), 2.97 (s, 1H), 2.04-1.95 (m, 1H),
1.91 (s, 2H), 1.39 (s, 6H), 1.20-0.90 (m, 2H), 0.90-0.84 (m, 2H),
0.75-0.58 (m, 4H).
[0605] Benzeneacetic acid,
4-[(8-cyclopropyl-3,4-dihydro-4,4-dimethylspiro-
[2H-1-benzopyran-2,1'-cyclopropane]-6-yl)ethynyl]-methyl ester
(Compound 47, General Formula 1)
[0606] Following general procedure F and using
8-cyclopropyl-6-ethynyl-3,4-
-dihydro-4,4-dimethylspiro[2H-1-benzopyran-2,1'-cyclopropane]
(Intermediate 44, 0.11 g, 0.43 mmol), methyl-4-iodo phenyl acetate
(Reagent B, 0.1 14 g, 0.41 mmol), triethyl amine (5 mL),
tetrahydrofuran (3 mL), copper(I)iodide (0.025 g, 0.13 mmol) and
dichlorobis(triphenylpho- sphine)palladium(II) (0.075 g, 0.11
mmol), the title compound was obtained as a clear oil (0.096 g,
56%).
[0607] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.46 (d, 2H,
J=8.0 Hz), 7.31 (d, 1H, J=1.9 Hz), 7.24 (d, 2H, J=8.2 Hz), 6.81 (d,
1H, J=1.9 Hz), 3.69 (s, 3H), 3.62 (s, 2H), 2.04-1.95 (m, 1H), 1.90
(s, 2H), 1.39 (s, 6H), 1.03-0.99 (m, 2H), 0.90-0.83 (m, 2H),
0.68-0.59 (m, 4H).
[0608] Benzeneacetic acid,
4-[(8-cyclopropyl-3,4-dihydro-4,4-dimethylspiro-
[2H-1-benzopyran-2,1'-cyclopropane]-6-yl)ethynyl]- (Compound 48,
General Formula 1)
[0609] Following general procedure L and using benzeneacetic acid,
4-[(8-cyclopropyl-3,4-dihydro-4,4-dimethylspiro[2H-1-benzopyran-2,1'-cycl-
opropane]-6-yl)ethynyl]-methyl ester (Compound 47, 0.96 g, 0.24
mmol), 5 mL of methanol and 1M sodium hydroxide solution (2 mL)
followed by flash column chromatography over silica gel (230-400
mesh) using 15% methanol in dichloromethane as the eluent, the
title compound was obtained as a solid (0.084 g, 91%).
[0610] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 10.27 (br s, 1H),
7.46 (d, 2H, J=8.2 Hz), 7.30 (d, 1H, J=1.8 Hz), 7.23 (d, 2H, J=8.2
Hz), 6.80 (d, 1H, J=1.5 Hz), 3.63 (s, 2H), 2.07-1.94 (m, 1H), 1.89
(s, 2H), 1.39 (s, 6H), 1.03-0.98 (m, 2H), 0.89-0.82 (m, 2H),
0.73-0.59 (m, 4H).
[0611]
4-[(8-Cyclopropyl-3,4-dihydro-4,4-dimethylspiro[2H-1-benzopyran-2
1'-cyclopropane]-6-yl)ethynyl]-2-fluoro-benzeneacetic acid methyl
ester (Compound 49, General Formula 1)
[0612] Following general procedure F and using
8-cyclopropyl-6-ethynyl-3,4-
-dihydro-4,4-dimethylspiro[2H-1-benzopyran-2,1'-cyclopropane]
(Intermediate 44, 0.125 g, 0.5 mmol), methyl-2-fluoro-4-iodo phenyl
acetate (Reagent H, 0. 14 g, 0.5 mmol), triethyl amine (3 mL),
tetrahydrofuran (3 mL), copper(I)iodide (0.020 g, 0.1 mmol) and
dichlorobis(triphenylphosphine)palladium(II) (0.060 g, 0.085 mmol)
followed by preparative normal phase HPLC using 10% ethyl acetate
in hexane as the mobile phase, the title compound was obtained
(0.096 g, 46%).
[0613] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.30 (d, 1H,
J=2.1 Hz), 7.26-7.18 (m, 3H), 6.80 (d, 1H, J=1.8 Hz), 3.71 (s, 3H),
3.67 (s, 2H), 2.04-1.94 (m, 1H), 1.90 (s, 2H), 1.40 (s, 6H),
1.18-0.99 (m, 2H), 0.90-0.83 (m, 2H), 0.68-0.59 (m, 4H).
[0614]
4-[(8-Cyclopropyl-3,4-dihydro-4,4-dimethylspiro[2H-1-benzopyran-2,1-
'-cyclopropane]-6-yl)ethynyl]-2-fluoro-benzeneacetic acid (Compound
50, General Formula 1)
[0615] Following general procedure L and using
4-[(8-cyclopropyl-3,4-dihyd-
ro-4,4-dimethylspiro[2H-1-benzopyran-2,1'-cyclopropane]-6-yl)ethynyl]-2-fl-
uoro-benzeneacetic acid methyl ester (Compound 49, 0.096 g, 0.23
mmol), 5 mL of methanol and 1M sodium hydroxide solution (2 mL)
followed by flash column chromatography over silica gel (230-400
mesh) using 15% methanol in dichloromethane as the eluent, the
title compound was obtained as a solid (0.093 g, 100%).
[0616] .sup.1H NMR (300 MHz, CDCl.sub.3):.delta. 9.50 (br s, 1H),
7.27 (d, 1H, J=2.1 Hz), 7.24-7.15 (m, 3H), 6.77 (d, 1H, J=1.5 Hz),
3.67 (s, 2H), 2.01-1.91 (m, 1H), 1.87 (s, 2H), 1.36 (s, 6H),
1.01-0.96 (m, 2H), 0.87-0.80 (m, 2H), 0.65-0.56 (m, 4H).
[0617] Benzoic acid 4-[(8-cyclopropyl-3
4-dihydro-4,4-dimethylspiro[2H-1-b-
enzopyran-2,1'-cyclopropane]-6-yl)ethynyl]-ethyl ester (Compound
51, General Formula 1)
[0618] Following general procedure F and using
8-cyclopropyl-6-ethynyl-3,4-
-dihydro-4,4-dimethylspiro[2H-1-benzopyran-2,1'-cyclopropane]
(Intermediate 44, 0.05 g, 0.2 mmol), ethyl-4-iodo-benzoate (Reagent
A, 0.055 g, 0.2 mmol), triethyl amine (3 mL), tetrahydrofuran(3
mL), copper(I)iodide(0.020 g, 0.1 mmol) and
dichlorobis(triphenylphosphine)pal- ladium(II) (0.060 g, 0.085
mmol), the title compound was obtained (0.06 g, 75%).
[0619] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 8.00 (d, 2H,
J=8.2 Hz), 7.55 (d, 2H, J=8.2 Hz), 7.33 (d, 1H, J=1.8 Hz), 6.83 (d,
1H, J=2.1 Hz), 4.38 (q, 2H, J=7.1 Hz), 2.04-1.95 (m, 1H), 1.91 (s,
2H), 1.40 (s, 6H), 1.40 (t, 3H, J=7.0 Hz), 1.05-0.95 (m, 2H),
0.91-0.84 (m, 2H), 0.69-0.61 (m, 4H).
[0620] Benzoic acid 4-[(8-cyclopropyl-3
4-dihydro-4,4-dimethylspiro[2H-1-b-
enzopyran-2,1'-cyclopropane]-6-yl)ethynyl]-(Compound 52, General
Formula 1)
[0621] Following general procedure L and using benzoic acid,
4-[(8-cyclopropyl-3,4-dihydro-4,4-dimethylspiro[2H-1-benzopyran-2,1'-cycl-
opropane]-6-yl)ethynyl]-ethyl ester (Compound 51, 0.06 g, 0.15
mmol), 5 mL of methanol and 1M sodium hydroxide solution (2 mL)
followed by preparative reverse phase HPLC using 10% water in
acetonitrile as the mobile phase, the title compound was obtained
as a solid (0.040 g, 72%).
[0622] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 8.08 (d, 2H,
J=8.8 Hz), 7.60 (d, 2H, J=8.8 Hz), 7.34 (d, 1H, J=1.9 Hz), 6.84 (d,
1H, J=1.9 Hz), 2.05-1.96 (m, 1H), 1.92 (s, 2H), 1.41 (s, 6H),
1.05-0.95 (m, 2H), 0.92-0.83 (m, 2H), .0.75-0.60 (m, 4H).
[0623] 4-[(8-Cyclopropyl-3
4-dihydro-4,4-dimethylspiro[2H-1-benzopyran-2,1-
'-cyclopropane]-6-yl)ethynyl]-2-fluoro-benzoic acid methyl ester
(Compound 53, General Formula 1)
[0624] Following general procedure F and using
8-cyclopropyl-6-ethynyl-3,4-
-dihydro-4,4-dimethylspiro[2H-1-benzopyran-2,1'-cyclopropane]
(Intermediate 44, 0.03 g, 0.11 mmol),
methyl-2-fluoro-4-iodo-benzoate (Reagent G, 0.025 g, 0.09 mmol),
triethyl amine (3 mL), tetrahydrofuran(3 mL), copper(I)iodide(0.020
g, 0.1 mmol) and dichlorobis(triphenylphosphin- e)palladium(II)
(0.06 g, 0.085 mmol) followed by preparative normal phase HPLC
using 10% ethyl acetate in hexane as the mobile phase, the title
compound was obtained as a white solid (0.019 g, 40%).
[0625] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.97 (t, 1H,
J=7.8 Hz), 7.34 (d, 1H, J=1.9 Hz), 7.32-7.25 (m, 2H), 6.83 (d, 1H,
J=1.9 Hz), 3.95 (s, 3H), 2.06-1.96 (m, 1H), 1.93 (s, 2H), 1.42 (s,
6H), 1.06-1.02 (m, 2H), 0.91-0.86 (m, 2H), 0.71-0.61 (m, 4H).
[0626]
4-[(8-Cyclopropyl-3,4-dihydro-4,4-dimethylspiro[2H-1-benzopyran-2
1'-cyclopropane]-6-yl)ethynyl]-2-fluoro-benzoic acid (Compound 54,
General Formula 1)
[0627] Following general procedure L and using
4-[(8-cyclopropyl-3,4-dihyd-
ro-4,4-dimethylspiro[2H-1-benzopyran-2,1'-cyclopropane]-6-yl)ethynyl]-2-fl-
uoro-benzoic acid methyl ester (Compound 53, 0.019 g, 0.047 mmol),
5 mL of methanol and 1M sodium hydroxide solution (2 mL) followed
by preparative reverse phase HPLC using 10% water in acetonitrile
as the mobile phase, the title compound was obtained as a solid
(0.01 g, 56%).
[0628] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.99 (t, 1H,
J=8.0 Hz), 7.36-7.28 (m, 3H), 6.83 (d, 1H, J=1.9 Hz), 2.18-1.95 (m,
1H), 1.92 (s, 2H), 1.41 (s, 6H), 1.06-1.01 (m, 2H), 0.96-0.83 (m,
2H), 0.76-0.60 (m, 4H).
[0629] 8-Acetyl-6-bromo-2,2,4,4-tetramethyl chroman (Intermediate
45)
[0630] A stirred, cooled (ice bath) suspension of aluminum chloride
(0.99 g, 7.46 mmol) in anhydrous dichloromethane (20 mL) was
treated with acetyl chloride (0.58 g, 7.46 mmol). After 5 minutes,
a solution of 6-bromo-2,2,4,4-tetramethyl chroman (1 g, 3.73
mmol)in dichloromethane was added. The reaction was allowed to warm
to ambient temperature and stirred for 2 h. The reaction mixture
was then poured into ice containing 10% hydrochloric acid and
extracted with diethyl ether (x2). The combined organic phase was
washed with saturated aqueous sodium bicarbonate solution, dried
over anhydrous sodium sulfate, filtered and evaporated in vacuo to
a residue which was subjected to flash column chromatography over
silica gel (230-400 mesh) using 5% ethyl acetate in hexane as the
eluent to afford the title compound as a pale yellow oil (0.95 g,
83%). It was used as such for the next step without any
characterization.
[0631] 6-Bromo-8-ethyl-2,2,4,4-tetramethyl chroman (Intermediate
46)
[0632] A stirred, cooled (ice bath) solution of
8-acetyl-6-bromo-2,2,4,4-t- etramethyl chroman (Intermediate 45,
0.95 g, 3.1 mmol) in trifluoroacetic acid (10 mL) was treated with
triethylsilane (10 mL) and the resulting reaction mixture was
allowed to warm to ambient temperature and stirred overnight. The
volatiles were distilled off in vacuo and the residue was diluted
with water and extracted with hexane (x2). The combined organic
phase was dried over anhydrous sodium sulfate, filtered and
evaporated in vacuo to an oil which was subjected to flash column
chromatography over silica gel (230-400 mesh) using hexane as the
eluent to afford the title compound as a clear oil, contaminated
with a small amount to triethylsilane (0.51 g, 56%).
[0633] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.23 (d, 1H,
J=2.3 Hz), 7.08 (d, 1H, J=2.3 Hz), 2.58 (q, 2H, J=7.6 Hz), 1.81 (s,
2H), 1.34 (s, 6H), 1.33 (s, 6H), 1.17 (t, 3H, J=7.6 Hz).
[0634] 8-Ethyl-6-trimethylsilanylethynyl-2,2,4,4-tetramethyl
chroman (Intermediate 47)
[0635] Following general procedure D and using
6-bromo-8-ethyl-2,2,4,4-tet- ramethyl chroman (Intermediate 46, 0.5
g, 1.61 mmol), (trimethylsilyl)acetylene (1.57 g, 16.1 mmol),
triethyl amine (8 mL), anhydrous tetrahydrofuran (10 mL),
copper(I)iodide (0.025 g, 0. 13 mmol) and
dichlorobis(triphenylphosphine)palladium(II) (0.075 g, 0.11 mmol),
followed by flash column chromatography over silica gel (230-400
mesh) using 5% ethyl acetate in hexane as the eluent, the title
compound was obtained as an oil (0.137 g, 27%).
[0636] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.27 (d, 1H,
J=2.1 Hz), 7.10 (d, 1H, J=2.1 Hz), 2.55 (q, 2H, J=7.6 Hz), 1.81 (s,
2H), 1.33 (s, 6H), 1.32 (s, 6H), 1.15 (t, 3H, J=7.6 Hz), 0.24 (s,
9H).
[0637] 8-Ethyl-6-ethynyl-2,2,4,4-tetramethyl chroman (Intermediate
48)
[0638] Following general procedure E and using
8-ethyl-6-trimethylsilanyle- thynyl-2,2,4,4-tetramethyl chroman
(Intermediate 47, 0.137 g, 0.44 mmol), methanol and potassium
carbonate (0.1 g, 0.72 mmol) followed by flash column
chromatography over silica gel (230-400 mesh) using 5% ethyl
acetate in hexane as the eluent, the title compound was obtained as
an oil (0.066 g, 62%).
[0639] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.33 (d, 1H,
J=2.2 Hz), 7.15 (d, 1H, J=1.6 Hz), 2.99 (s, 1H), 2.59 (q, 2H, J=7.6
Hz), 1.84 (s, 2H), 1.37 (s, 6H), 1.35 (s, 6H), 1.19 (t, 3H, J=7.6
Hz).
[0640] [4-(8-Ethyl-2,2,4,4-tetramethyl-chroman-6-yl-ethynyl)
phenyl] acetic acid methyl ester (Compound 55, General Formula
8)
[0641] Following general procedure F and using
8-ethyl-6-ethynyl-2,2,4,4-t- etramethylchroman (Intermediate 48,
0.033 g, 0.136 mmol),methyl-4-iodo phenyl acetate (Reagent B, 0.034
g, 0.12 mmol), triethyl amine (2 mL), tetrahydrofuran (2 mL),
copper(I)iodide (0.025 g, 0.13 mmol) and
dichlorobis(triphenylphosphine)palladium(II) (0.075 g, 0.11 mmol)
the title compound was obtained (0.035 g, 73%).
[0642] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.49 (d, 2H,
J=7.9 Hz), 7.35 (d, 1H, J=1.8 Hz), 7.26 (d, 2H, J=7.9 Hz), 7.18 (d,
1H, J=1.9 Hz), 3.72 (s, 3H), 3.65 (s, 2H), 2.61 (q, 2H, J=7.5 Hz),
1.85 (s, 2H), 1.38 (s, 12H), 1.21 (t, 3H, J=7.5 Hz).
[0643] [4-(8-Ethyl-2,2,4,4-tetramethyl-chroman-6-yl-ethynyl)
phenyl] acetic acid (Compound 56, General Formula 8)
[0644] Following general procedure L and using
[4-(8-ethyl-2,2,4,4-tetrame- thyl-chroman-6-ylethynyl) phenyl]
acetic acid methyl ester (Compound 55, 0.035 g, 0.1 mmol), 5 mL of
methanol and 1M sodium hydroxide solution (1 mL) followed by
preparative reverse phase HPLC using 10% water in acetonitrile as
the mobile phase, the title compound was obtained as a solid (0.11
g, 25%).
[0645] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.48 (d, 2H,
J=8.0 Hz), 7.33 (d, 1H, J=1.9 Hz), 7.25 (d, 2H, J=8.0 Hz), 7.15 (d,
1H, J=1.9 Hz), 3.65 (s, 2H), 2.59 (q, 2H, J=7.5 Hz), 1.83 (s, 2H),
1.35 (s, 12H), 1.18 (t, 3H, J=7.4 Hz).
[0646] Spiro[2H-1-benzopyran-2,1'-cyclopropane]-6-carboxylic acid,
8-cyclopropyl-3,4-dihydro-4,4-dimethyl-(Intermediate 49)
[0647] Following general procedure R and using
6-bromo-8-cyclopropyl-3,4-d-
ihydro-4,4-dimethylspiro[2H-1-benzopyran-2,1'-cyclopropane]
(Intermediate 42, 0.45 g, 1.48 mmol), anhydrous tetrahydrofuran (5
mL), 1.7M solution of tert-butyl lithium solution in pentane (1.74
mL, 2.96 mmol) and carbon dioxide generated from dry ice, followed
by flash column chromatography over silica gel (230-400 mesh) using
50% ethyl acetate in hexane as the eluent, the title compound was
obtained as a white solid (0.34 g, 85%).
[0648] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 12.43 (br s, 1H),
7.94 (d, 1H, J=2.1 Hz), 7.42 (d, 1H, J=1.8 Hz), 2.06-1.96 (m, 1H),
1.92 (s, 2H), 1.42 (s, 6H), 1.12-0.97 (m, 2H), 0.95-0.81 (m, 2H),
0.77-0.60 (m, 4H).
[0649] Spiro[2H-1-benzopyran-2. 1 '-cyclopropane]-6-carboxylic
acid,
8-cyclopropyl-3,4-dihydro-4,4-dimethyl-,4-(tert-butoxycarbonylmethyl)phen-
yl ester (Compound 57, General Formula 1)
[0650] A solution of
spiro[2H-1-benzopyran-2,1'-cyclopropane]-6-carboxylic acid,
8-cyclopropyl-3,4-dihydro-4,4-dimethyl- (Intermediate 49, 0.06 g,
0.22 mmol) in anhydrous dichloromethane (5 mL) was treated with
tert-butyl-4-hydroxy phenyl acetate (Reagent E, 0.05 g, 0.22 mmol)
followed by 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide
hydrochloride (0.11 g, 0.22 mmol) and 4-dimethylaminopyridine
(0.028 g, 0.22 mmol). The resulting solution was stirred at ambient
temperature overnight. The reaction mixture was subjected to flash
column chromatography over silica gel (230-400 mesh) using 7% ethyl
acetate in hexane as the eluent to afford the title compound as a
clear oil that solidified on standing (0.048 g, 48%).
[0651] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.91 (d, 1H,
J=2.1 Hz), 7.41 (d, 1H, J=1.8 Hz), 7.24 (d, 2H, J=8.8 Hz), 7.05 (d,
2H, J=8.5 Hz), 3.46 (s, 2H), 1.97-1.90 (m, 1H), 1.87 (s, 2H), 1.37
(s, 9H), 1.36 (s, 6H), 1.04-0.90 (m, 2H), 0.87-0.75 (m, 2H),
0.65-0.56 (m, 4H).
[0652] Spiro[2H-1-benzopyran-2 1'-cyclopropane]-6-carboxylic acid
8-cyclopropyl-3,4-dihydro-4,4-dimethyl-4-(carboxymethyl)phenyl
ester (Compound 58, General Formula 1)
[0653] A solution of
spiro[2H-1-benzopyran-2,1'-cyclopropane]-6-carboxylic acid,
8-cyclopropyl-3,4-dihydro-4,4-dimethyl-,4-(tert-butoxycarbonylmethy-
l)phenyl ester (Compound-57, 0.048 g, 0.105 mmol) was treated with
2 mL of trifluoroacetic acid and stirred at ambient temperature for
2 h. The trifluoroacetic acid was distilled off under reduced
pressure and the residue was subjected to preparative reverse phase
HPLC using 10% water in acetonitrile as the mobile phase to afford
the title compound as a white solid (0.029 g, 55%).
[0654] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.99 (d, 1H,
J=2.2 Hz), 7.48 (d, 1H, J=1.9 Hz), 7.34 (d, 2H, J=8.5 Hz), 7.16 (d,
2H, J=8.5 Hz), 3.67 (s, 2H), 2.07-1.97 (m, 1H), 1.95 (s, 2H), 1.44
(s, 6H), 1.09-1.04 (m, 2H), 0.93-0.85 (m, 2H), 0.79-0.64 (m,
4H).
[0655] Spiro[2H-1-benzopyran-2,1'-cyclopropane]-6-carboxylic acid,
8-cyclopropyl-3,4-dihydro-4,4-dimethyl-3-(tert-butoxycarbonylmethyl)pheny-
l ester (Compound 59, General Formula 1)
[0656] A solution of
spiro[2H-1-benzopyran-2,1'-cyclopropane]-6-carboxylic acid,
8-cyclopropyl-3,4-dihydro-4,4-dimethyl- (Intermediate 49, 0.05 g,
0.1 8 mmol) in anhydrous dichloromethane (5 mL) was treated with
tert-butyl-3-hydroxy phenyl acetate (Reagent F, 0.04 g, 0.1 8 mmol)
followed by 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide
hydrochloride (0.029 g, 0.1 mmol) and 4-dimethylaminopyridine
(0.022 g, 0.18 mmol). The resulting solution was stirred at ambient
temperature overnight. The reaction mixture was subjected to flash
column chromatography over silica gel (230-400 mesh) using 7% ethyl
acetate in hexane as the eluent to afford the title compound as a
clear oil that solidified on standing (0.020 g, 23%).
[0657] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.98 (d, 1H,
J=1.9 Hz), 7.48 (d, 1H, J=2.2 Hz), 7.38 (t, 1H, J=7.7 Hz),
7.19-7.11 (m, 3H), 3.68 (s, 2H), 2.05-1.94 (m, 1H), 1.95 (s, 2H),
1.44 (s, 15H), 1.09-1.04 (m, 2H), 0.96-0.82 (m, 2H), 0.73-0.64 (m,
4H).
[0658] Spiro[2H-1-benzopyran-2 1 '-cyclopropane]-6-carboxylic acid,
8-cyclopropyl-3,4-dihydro-4,4-dimethyl-, 3-(carboxymethyl)phenyl
ester (Compound 60, General Formula 1)
[0659] A solution of
spiro[2H-1-benzopyran-2,1'-cyclopropane]-6-carboxylic acid,
8-cyclopropyl-3,4-dihydro-4,4-dimethyl-,
3-(tert-butoxycarbonylmeth- yl)phenyl ester (Compound 59, 0.020 g,
0.04 mmol) was treated with 2 mL of trifluoroacetic acid and
stirred at ambient temperature for 2 h. The trifluoroacetic acid
was distilled off under reduced pressure and the residue was
subjected to preparative reverse phase HPLC using 10% water in
acetonitrile as the mobile phase to afford the title compound as a
white solid (0.0125 g, 62%).
[0660] .sup.1H NMR(300 MHz, CDCl.sub.3): .delta. 7.99 (d, 1H, J=2.1
Hz), 7.49 (d, 1H, J=2.1 Hz), 7.36 (t, 1H, J=7.8 Hz), 7.18-7.08 (m,
3H), 3.56 (s, 2H), 2.06-1.95 (m, 1H), 1.95 (s, 2H), 1.45 (s, 6H),
1.09-1.05 (m, 2H), 0.96-0.84 (m, 2H), 0.74-0.65 (m, 4H).
[0661] 6-Bromo-4,4-dimethyl-1
2,3,4-tetrahydro-quinoline-1-carbaldehyde (Intermediate 50)
[0662] A solution of
6-bromo-4,4-dimethyl-1,2,3,4-tetrahydroquinoline, available in
accordance with U.S. Pat. No. 5,089,509, the specification of which
is incorporated herein by reference (1.8 g, 7.5 mmol) in 1 0 mL of
formic acid was refluxed for 3 h. The reaction mixture was then
cooled to ambient temperature and poured into ice-cold saturated
aqueous sodium bicarbonate solution and extracted with diethyl
ether (x2). The combined organic phase was dried over anhydrous
sodium sulfate, filtered and evaporated in vacuo to a residue which
was subjected to flash column chromatography over silica gel
(230-400 mesh) using 15-25% ethyl acetate in hexane as the eluent
to afford the title compound as a pale yellow solid (1.8 g,
90%).
[0663] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 8.71 (s, 1H),
7.45 (d, 1H, J=2.2 Hz), 7.28 (dd, 1H, J=2.2, 8.5 Hz), 6.98 (d, 1H,
J=8.5 Hz), 3.78 (t, 2H, J=6.3 Hz), 1.74 (t, 2H, J=6.3 Hz), 1.28 (s,
6H).
[0664]
6-Bromo-1-cyclopropyl-4,4-dimethyl-1,2,3,4-tetrahydroquinoline
(Intermediate 51)
[0665] A stirred, cooled (0.degree. C.) solution of
6-bromo-4,4-dimethyl-1,2,3,4-tetrahydro-quinoline-1-carbaldehyde
(Intermediate 50, 21.8, 6.7 mmol) in anhydrous tetrahydrofuran (20
mL) under argon was treated with titanium tetra-iso-propoxide (2.15
mL, 7.39 mmol) followed by 3M solution of ethyl magnesium bromide
in diethyl ether (5.6 mL, 16.8 mmol) and the reaction mixture was
then heated at 50.degree. C. overnight. It was then cooled in an
ice-bath, quenched with saturated aqueous ammonium chloride
solution and extracted with diethyl ether (x2). The combined
organic phase was dried over anhydrous sodium sulfate, filtered
over celite and evaporated in vacuo to residue which was subjected
to flash column chromatography over silica gel (230-400 mesh) using
5% ethyl acetate in hexane as the eluent to afford the title
compound as an oil (1.2 g, 64%).
[0666] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.24 (d, 1H,
J=2.5 Hz), 7.12 (dd, 1H, J=2.2, 8.8 Hz), 7.01 (d, 1H, J=8.8 Hz),
3.20 (t, 2H, J=6.0 Hz), 2.27-2.20 (m, 1H), 1.68 (t, 2H, J=5.9 Hz),
1.24 (s, 3H), 1.23 (s, 3H), 0.83-0.77 (m, 2H), 0.60-0.55 (m,
2H).
[0667]
1-Cyclopropyl-6-trimethylsilanylethynyl-4,4-dimethyl-1,2,3,4-tetrah-
ydro-quinoline (Intermediate 52)
[0668] Following general procedure D and using
6-bromo-1-cyclopropyl-4,4-d- imethyl-1,2,3,4-tetrahydro quinoline
(Intermediate 51, 0.8 g, 2.86 mmol), (trimethylsilyl)acetylene (5
mL, 35 mmol), triethyl amine (10 mL), anhydrous tetrahydrofuran,
copper(I)iodide (0.080 g, 0.42 mmol) and
dichlorobis(triphenylphosphine)palladium(II) (0.240 g, 0.34 mmol),
the title compound was obtained as an oil (0.67 g, 79%).
[0669] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.33 (d, 1H,
J=1.8 Hz), 7.22 (dd, 1H, J=2.1, 8.5 Hz), 7.06 (d, 1H, J=8.5 Hz),
3.27 (t, 2H, J=5.9 Hz), 2.37-2.31 (m, 1H), 1.70 (t, 2H, J=6.0 Hz),
1.28 (s, 6H), 0.89-0.82 (m, 2H), 0.66-0.60 (m, 2H), 0.28 (s,
9H).
[0670]
1-Cyclopropyl-6-ethynyl-4,4-dimethyl-1,2,3,4-tetrahydroquinoline:
(Intermediate 53)
[0671] Following general procedure E and using
1-cyclopropyl-6-trimethylsi-
lanylethynyl-4,4-dimethyl-1,2,3,4-tetrahydroquinoline (Intermediate
52, 0.40 g, 1.34 mmol), methanol and potassium carbonate (0.2 g,
1.47 mmol) followed by flash column chromatography over silica gel
(230-400 mesh) using 2% ethyl acetate in hexane as the eluent, the
title compound was obtained as an oil (0.17 g, 56%).
[0672] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.38 (d, 1H,
J=2.1 Hz), 7.27 (dd, 1H, J=2.1, 8.5 Hz), 7.11 (d, 1H, J=8.5 Hz),
3.30 (t, 2H, J=6.0 Hz), 3.02 (s, 1H), 2.40-2.34 (m, 1H), 1.74 (t,
2H, J=6.0 Hz), 1.30 (s, 6H), 0.93-0.85 (m, 2H), 0.70-0.63 (m,
2H).
[0673]
4-(1-Cyclopropyl-4,4-dimethyl-1,2,3,4-tetrahydro-quinolin-6-yl-ethy-
nyl)-benzoic acid ethyl ester (Compound 61, General Formula 7)
[0674] Following general procedure F and using
1-cyclopropyl-6-ethynyl-4,4- -dimethyl-1,2,3,4-tetrahydro quinoline
(Intermediate 53, 0.11 g, 0.43 mmol), ethyl-4-iodo-benzoate
(Reagent A, 0.11 g, 0.9 mmol), triethyl amine (3 mL),
tetrahydrofuran(3 mL), copper(I)iodide(0.02 g, 0.1 mmol) and
dichlorobis(triphenylphosphine)palladium(II) (0.060 g, 0.085 mmol)
followed by flash column chromatography over silica gel (230-400
mesh) using 5-10% ethyl acetate in hexane as the eluent, the title
compound was obtained (0.05 g, 31%).
[0675] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.99 (d, 2H,
J=8.2 Hz), 7.54 (d, 2H, J=8.2 Hz), 7.37 (d, 1H, J=2.1 Hz), 7.26
(dd, 1H, J=2.1, 8.5 Hz), 7.10 (d, 1H, J=8.8 Hz), 4.37 (q, 2H, J=7.1
Hz), 3.28 (t, 2H, J=6.0 Hz), 2.40-2.33 (m, 1H), 1.71 (t, 2H, J=5.8
Hz), 1.40 (t, 3H, J=7.0 Hz), 1.27 (s, 6H), 0.94-0.82 (m, 2H),
0.65-0.60 (m, 2H).
[0676]
4-(1-Cyclopropyl-4,4-dimethyl-1,2,3,4-tetrahydroquinolin-6-yl-ethyn-
yl)-benzoic acid (Compound 62, General Formula 7)
[0677] Following general procedure L and using
4-(1-cyclopropyl-4,4-dimeth-
yl-1,2,3,4-tetrahydro-quinolin-6-ylethynyl)-benzoic acid ethyl
ester (Compound 61, 0.05 g, 0.13 mmol), 5 mL of ethanol and 5M
sodium hydroxide solution (2 mL) followed by recrystallization from
hot ethyl acetate, the title compound was obtained as a solid
(0.030 g, 64%).
[0678] .sup.1H NMR (300 MHz, DMSO-d.sub.6): .delta. 7.92 (d, 2H,
J=8.2 Hz), 7.57 (d, 2H, J=8.2 Hz), 7.33 (d, 1H, J=1.9 Hz), 7.23
(dd, 1H, J=1.9, 8.5 Hz), 7.06 (d, 1H, J=8.8 Hz), 3.25 (t, 2H, J=5.8
Hz), 2.41-2.34 (m, 1H), 1.64 (t, 2H, J=5.6 Hz), 1.21 (s, 6H),
0.87-0.81 (m, 2H), 0.59-0.54 (m, 2H).
[0679]
[4-(1-Cyclopropyl-4,4-dimethyl-1,2,3,4-tetrahydro-quinolin-6-yl-eth-
ynyl)phenyl] acetic acid methyl ester (Compound 63, General Formula
7)
[0680] Following general procedure F and using
1-cyclopropyl-6-ethynyl-4,4- -dimethyl-1,2,3,4-tetrahydro quinoline
(Intermediate 53, 0.05 g, 0.22 mmol), methyl-4-iodo-phenyl acetate
(Reagent B, 0.055 g, 0.2 mmol), triethyl amine (5 mL),
tetrahydrofuran, copper(I)iodide(0.025 g, 0.13 mmol) and
dichlorobis(triphenylphosphine)palladium(II) (0.75 g, 0.11 mmol)
followed preparative normal phase HPLC using 10% ethyl acetate in
hexane as the mobile phase, the title compound was obtained (0.089
g, 100%).
[0681] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.47 (d, 2H,
J=8.8 Hz), 7.45 (d, 1H, J=1.8 Hz), 7.35-7.22 (m, 2H), 7.10 (d, 2H,
J=8.8 Hz), 3.70 (s, 3H), 3.63 (s, 2H), 3.27 (t, 2H, J=6.0 Hz),
2.37-2.31 (m, 1H), 1.71 (t, 2H, J=6.0 Hz), 1.27 (s, 6H), 0.89-0.81
(m, 2H), 0.65-0.60 (m, 2H).
[0682]
[4-(1-Cyclopropyl-4,4-dimethyl-1,2,3,4-tetrahydro-quinolin-6-yl-eth-
ynyl)-2-fluoro-phenyl]acetic acid ethyl ester (Compound 64, General
Formula 7)
[0683] Following general procedure F and using
1-cyclopropyl-6-ethynyl-4,4- -dimethyl-1,2,3,4-tetrahydro quinoline
(Intermediate 53, 0.11 g, 0.49 mmol), ethyl-2-fluoro-4-iodo-phenyl
acetate (Reagent C, 0.11 g, 0.9 mmol), triethyl amine (3 mL),
tetrahydrofuran(3 mL), copper(I)iodide(0.06 g, 0.32 mmol) and
dichlorobis(triphenylphosphine)palladium(II) (0.25 g, 0.36 mmol)
followed by flash column chromatography over silica gel (230-400
mesh) using 10% ethyl acetate in hexane as the eluent, the title
compound was obtained (0.1 g, 51%).
[0684] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.34 (d, 1H,
J=2.1 Hz), 7.25-7.17 (m, 3H), 7.09 (d, 2H, J=8.8 Hz), 4.17 (q, 2H,
J=7.1 Hz), 3.65 (s, 2H), 3.27 (t, 2H, J=6.0 Hz), 2.38-2.31 (m, 1H),
1.69 (t, 2H, J=6.0 Hz), 1.27 (s, 6H), 1.25 (t, 3H, J=7.1 Hz),
0.88-0.81 (m, 2H), 0.65-0.59 (m, 2H).
[0685] N-(4-Bromophenyl)-N-methyl-3-methyl-2-butenamide
(Intermediate 54)
[0686] 3,3-Dimethylacryloyl chloride (3 mL, 27 mmol) was added to a
solution of 4-bromo-N-methyl-aniline (4.55 g, 25 mmol) in 150 mL of
dichloromethane followed after 5 minutes by triethyl amine (5 mL,
33 mmol). After 2.5 h at ambient temperature, the reaction mixture
was washed with water and the organic phase was dried over
anhydrous sodium sulfate and evaporated in vacuo to afford the
title product as a brown oil in quantitative yield.
[0687] .sup.1H-NMR (300 MHz, CDCl.sub.3): d 1.71 (s, 3H), 2.11(s,
3H), 3.28(s, 3H), 5.47(s, 1H), 7.05(d, J=8.5 Hz, 2H), 7.50(d,,J=8.2
Hz, 2H).
[0688] 6-Bromo-1,4,4-trimethyl-2-oxo-1,2,3,4-tetrahydroquinoline
(Intermediate 55)
[0689] N-(4-bromophenyl)-N-methyl-3-methyl-2-butenamide
(Intermediate 54, 6.42 g, 24 mmol) was heated to 130.degree. C. and
aluminum chloride (5 g, 37.4 mmol) was added in portions over 0.5
h. The reaction mixture was stirred for 1 hour at the same
temperature and then cooled to room temperature. Ice was added
cautiously to the solid, followed by 200 mL of iced water. The
reaction mixture was then extracted with ether (x2) and
dichloromethane (x1) and the combined organic phase was dried over
anhydrous magnesium sulfate and evaporated in vacuo to yield a
brown solid. The solid was treated with hexane-dichloromethane and
filtered to afford 1.7 g of product. The mother liquor was
evaporated and purified by flash column chromatography on silica
gel (230-400 mesh) to afford 2.9 g of the title compound as a solid
(total 72%).
[0690] .sup.1H-NMR (300 MHz, CDCl.sub.3): .delta.1.29(s, 6H),
2.49(s, 2H), 3.36(s, 3H), 6.87(d, J=8.2 Hz, 1H), 7.36(dd, J=2.0,
8.5 Hz, 1H), 7.39(d, J=2.0 Hz, 1H). 6-Bromo-1
4,4-trimethylspiro[2H-1-1 2,3
4-tetrahydroquinoline-2,1'-cyclopropane] (Intermediate 56)
[0691] A stirred, cooled (-78.degree. C.) 3M solution of ethyl
magnesium bromide in ether (8. 1 mL, 24.25 mmol) under argon was
treated with anhydrous tetrahydrofuran (20 mL) followed by a
solution of titanium tetra-iso-propoxide (3.15 mL, 10.2 mmol) in
tetrahydrofuran (10 mL). A solution of
6-bromo-1,4,4-trimethyl-2-oxo-1,2,3,4-tetrahydroquinoline
(Intermediate 55, 2.6 g, 9.7 mmol) was cannulated into the reaction
mixture and the solution was allowed to warm to room temperature
overnight. It was then cooled in an ice-bath, quenched with
saturated aqueous ammonium chloride solution, filtered over celite
and the aqueous phase was extracted with diethyl ether (x2). The
combined organic phase was dried over anhydrous magnesium sulfate,
filtered and evaporated in vacuo to afford an orange oil. Flash
column chromatography over silica gel (230-400 mesh) using 2-4%
ethyl acetate in hexane as the eluent afforded the title compound
as an oil which was 70% pure (1.7 g, 63%) and 0.5 g of recovered
starting material.
[0692] .sup.1H-NMR (300 MHz, CDCl.sub.3): .delta. 0.58(t, J=6.0 Hz,
2H), O.91(t, J=6.0 Hz, 2H), 1.35 (s, 6H), 1.70(s, 2H), 2.68 (s,
3H), 6.59 (d, J=8.8 Hz, 1H), 7.16(dd, J=2.3, 8.8 Hz, 1H), 7.33(d,
J=2.3 Hz, 1H).
[0693] 1,4,4-Trimethyl-6-(trimethylsilanyl)ethynylspiro[2H-1-1
2,3,4-tetrahydroquinoline-2,1'-cyclopropane] (Intermediate 57)
[0694] Following general procedure D and using
6-bromo-1,4,4-trimethylspir-
o[2H-1-1,2,3,4-tetrahydroquinoline-2,1'-cyclopropane] (Intermediate
56, 0.56 g, 2 mmol), (trimethylsilyl)acetylene (1.13 mL, 8 mmol),
triethyl amine (4 mL), anhydrous tetrahydrofuran (5 mL),
copper(I)iodide (0.08 g, 0.4 mmol) and
dichlorobis(triphenylphosphine)palladium(II) (0.28 g, 0.4 mmol),
followed by flash column chromatography over silica gel (230-400
mesh) using hexane-2% ethyl acetate in hexane as the eluent, the
title compound was obtained as an oil (0.42 g, 70%).
[0695] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 0.023(s, 9H),
0.33(t, J=6.1 Hz, 2H), 0.71(t, J=6.1 Hz, 2H), 1.10(s, 6H), 1.45(s,
2H), 2.41 (s, 3H), 6.31(d, J=8.5 Hz, 1H), 6.96 (dd, J=2.1, 8.5 Hz,
1H), 7.10(d, J=2.1 Hz, 1H).
[0696] Benzoic acid 4-[(1
4,4-trimethylspiro[2H-1-1,2,3,4-tetrahydroquinol-
ine-2,1'-cyclopropane]-6-yl)ethynyl]-ethyl ester (Compound 65,
General Formula 1)
[0697] Following general procedure E and using a solution of
1,4,4-trimethyl-6-(trimethylsilanyl)ethynylspiro[2H-1-1,2,3,4-tetrahydroq-
uinoline-2,1'-cyclopropane] (Intermediate 57, 0.416 g, 1.4 mmol),
methanol (10 mL), ethyl acetate (2 mL) and potassium carbonate
(1.08 g, mmol) a silyl deprotected acetylenic intermediate was
obtained which was used directly for the next step (0.25 g, 79%).
Following general procedure F and using part of the acetylenic
intermediate obtained as above (0.11 g, 0.5 mmol), ethyl-4-iodo
benzoate (Reagent A, 0.1 12 g, 0.4 mmol), triethyl amine (1 mL),
tetrahydrofuran (2.5 mL), copper(I)iodide (0.050 g, 0.26 mmol) and
tetrakis(triphenylphosphine)palladium(O)(0.096 g, 0.17 mmol)
followed by flash column chromatography over silica gel (230-400
mesh) using 8% ethyl acetate in hexane as the eluent and
preparative HPLC on Partisil 10 silica column using 10% ethyl
acetate in hexane as the mobile phase, the title compound was
obtained as a yellow oil (0.048 g, 26%).
[0698] .sup.1H-NMR (300 MHz, CDCl.sub.3): .delta. 0.60 (t, J=6.1
Hz, 2H), 0.99(t, J=6.1 Hz, 2H), 1.37(s, 6H), 1.42(t, J=7.0 Hz, 3H),
1.73(s, 2H), 2.68(s, 3H), 4.40 (q, J=7.0 Hz, 2H), 6.61(d, J=8.8 Hz,
1H), 7.28 (dd, J=2.1, 8.5 Hz, 1H), 7.42 (d, J=2.1 Hz, 1H), 7.57(d,
J=8.2 Hz, 2H), 8.01(d, J=8.2 Hz, 2H).
[0699] Benzoic acid 4-[(1 4,4-trimethylspiro[2H-1-1 2,3
4-tetrahydroquinoline-2,1'-cyclopropane]-6-yl)ethynyl]-(Compound
66, General Formula 1)
[0700] Following general procedure I and using benzoic acid,
4-[(1,4,4-trimethylspiro[2H-1-1,2,3,4-tetrahydroqunoline-2,1'-cyclopropan-
e]-6-yl)ethynyl]-ethyl ester (Compound 65, 0.03 g, 0.08 mmol),
ethanol (2 mL), tetrahydrofuran (2 mL) and 1 M aqueous sodium
hydroxide solution (1 mL), the title compound was obtained as a
yellow solid (0.020 g, 67%).
[0701] .sup.1H-NMR (300 MHz, CD.sub.3COCD.sub.3): .delta. 0.60 (t,
J=5.8 Hz, 2H), 1.03(t, J=5.8 Hz, 2H), 1.34(s, 6H), 1.74(s, 2H),
2.69(s, 3H), 6.60(d, J=8.5 Hz, 1H), 7.23 (dd, J=2.0, 8.4 Hz, 1H),
7.39 (d, J=2.0 Hz, 1H), 7.58(d, J=8.2 Hz, 2H), 8.01(d, J=8.2 Hz,
2H).
[0702] Esterification Methods:
[0703] Method A:
[0704] The carboxylic acid was combined with a solution of the
desired alcohol and concentrated sulfuric acid (20 to 1 v/v) and
the resulting mixture or solution (0.75 to 1.0 M) heated to reflux
overnight. The solution was cooled to room temperature, diluted
with Et.sub.2O, and washed with H.sub.2O, saturated aqueous
NaHCO.sub.3, and saturated aqueous NaCl before being dried over
MgSO.sub.4. Concentration of the dry solution under reduced
pressure afforded the desired carboxylic ester of sufficient purity
to be used directly in the next reaction.
[0705] Method B:
[0706] To a solution (0.67 to 1.0M) of the carboxylic acid in
acetone was added 1. I equivalents of the desired alkyl halide and
1.0 equivalents of solid potassium carbonate. The resulting mixture
was heated to reflux for 2 h and then allowed to stir at room
temperature overnight. The mixture was filtered and the filtrate
concentrated under reduced pressure. The product was isolated from
the residue by column chromatography using silica gel as the solid
phase.
[0707] Method C:
[0708] A solution (1M) of the carboxylic acid in thionyl chloride
was heated at reflux until analysis of a reaction aliquot by IR
spectroscopy showed the absence of the aryl carboxylic acid
carbonyl band (1705-1680 cm.sup.-1). The solution was cooled to
room temperature and concentrated under reduced pressure to give
the crude acyl chloride.
[0709] The acyl chloride was dissolved in CH.sub.2Cl.sub.2 and the
resulting solution (0.5 to 0.75M) treated with 1.1 equivalents the
desired alcohol and 2.0 equivalents of pyridine. After stirring
overnight at room temperature the solution was diluted with
Et.sub.2O and washed with H.sub.2O, 10% aqueous HCl, saturated
aqueous NaHCO.sub.3, and saturated aqueous NaCl before being dried
over Na.sub.2SO.sub.4. Concentration of the dry solution under
reduced pressure followed by column chromatography afforded the
desired ester.
[0710] GENERAL PROCEDURE 1 (preparation of Enol ethers):
[0711] A solution (0.35 M) of the aryl ester in anhydrous THF was
cooled to 0.degree. C. and treated with 1.0 equivalents of Tebbe's
Reagent
([.mu.-chloro-.mu.-methylene[bis(cyclopentadienyl)titanium]-dimethylalumi-
num] 0.5 M in toluene). After 30 minutes the solution was warmed to
room temperature and stirred for 30 minutes before being carefully
added to a 0.1 N NaOH solution at 0.degree. C. This mixture was
treated with hexanes and the solids removed by filtration through a
pad of Celite. The solids were washed with hexanes and the filtrate
passed through a second pad of Celite to remove any newly formed
solids. The organic layer was dried (Na.sub.2SO.sub.4) and
concentrated under reduced pressure. The desired enol ether was
isolated from the residue by column chromatography using 1-2% of
Et.sub.3N added to the eluant. (note: prolonged exposure of the
product to the column can result in hydrolysis and formation of the
corresponding methyl ketone.)
[0712] GENERAL PROCEDURE 2 (cyclopropanation of the enol
ethers):
[0713] To a solution (0.3 M) of the enol ether in anhydrous
Et.sub.2O was added 2.0 equivalent of Et.sub.2Zn (as a solution in
hexanes) and 2.0 equivalents of CH.sub.2I.sub.2. The resulting
solution was heated to reflux until analysis of a reaction aliquot
(by TLC or .sup.1H NMR) indicated that all of the starting enol
ether had been consumed. (note: Additional equal amounts of
Et.sub.2Zn and CH.sub.2I.sub.2 can be added to drive the reaction
to completion.) Upon cooling to room temperature the reaction was
carefully quenched by the addition of saturated aqueous NH.sub.4Cl.
The resulting mixture is extracted with Et.sub.2O and the combined
organic layers washed with H.sub.2O and saturated aqueous NaCl
before being dried over Na.sub.2SO.sub.4 and concentrated under
reduced pressure. The product is isolated from the residue by
column chromatography.
[0714] 1-Bromo-4-(1-methoxyvinyl)-benzene: (Intermediate 58)
[0715] Using General Procedure 1; methyl.4-bromo-benzoate (600.0
mg, 2.78 mmols), and 5.6 mL of Tebbe's Reagent (794.0 mg, 2.78
mmols) afforded 420.0 mg (70%) of the title compound as a colorless
oil after column chromatography (100% hexanes).
[0716] .sup.1H NMR (CDCl.sub.3) .delta.: 7.48-7.45 (4H, m), 4.64
(1H, d, J=2.9 Hz), 4.23 (1H, d, J=2.9 Hz), 3.73 (3H, s).
[0717] 1-Bromo-4-(1-methoxycyclopropyl)-benzene (Intermediate
59)
[0718] Using General Procedure 2;
1-bromo-4-(1-methoxyvinyl)-benzene (Intermediate 58, 410.0 mg, 1.92
mmols), Et.sub.2Zn (711.3 mg, 5.76 mmols), and CH.sub.2I.sub.2
(1.54 g, 5.76 mmols) in 4.0 mL Et.sub.2O afforded 300.0 mg (69%) of
the title compound as a colorless oil after chromatography (0-3%
EtOAc-hexanes).
[0719] .sup.1H NMR (CDCl.sub.3) .delta.: 7.46 (2H, d, J=8.5 Hz),
7.18 (2H, d, J=8.5 Hz), 3.21 (3H, s), 1.19 (2H, m), 0.94 (2H,
m).
[0720] [4-(1-Methoxycyclopropyl)-phenylethynyl]-trimethylsilane
(Intermediate 60)
[0721] Using General Procedure D;
1-bromo-4-(1-methoxycyclopropyl)-benzene (Intermediate 59, 300.0
mg, 1.32 mmol) in triethylamine (4 mL) and anhydrous
tetrahydrofuran (4 mL) was treated with copper(I)iodide (93.0 mg,
0.13 mmol) and then sparged with argon for 5 minutes.
Trimethylsilyl acetylene (1.39 g, 14.2 mmols) was then added
followed by dichlorobis(triphenylphosphine)palladium(II) (93.0 mg,
0.13 mmol). The resulting reaction mixture was heated to 70.degree.
C. for 60 h. The title compound (286.0 mg, 90%) was isolated by
chromatography (0-3% EtOAc-hexanes).
[0722] .sup.1H NMR (CDCl.sub.3) 6: 7.35 (2H, d, J=7.2 Hz), 7.14
(2H, d, J=7.2 Hz), 3.14 (3H, s), 1.14 (2H, m), 0.88 (2H, m), 0.17
(9H, s).
[0723] 1-Ethynyl-4-(1-methoxcyclopropyl)-benzene (Intermediate
61)
[0724] Using General Procedure E;
[4-(1-methoxycyclopropyl)-phenylethynyl]- -trimethylsilane
(Intermediate 60, 285.0 mg, 1.18 mmols) in methanol (10 mL) was
treated with potassium carbonate (100.0 mg, 0.72 mmol) and stirred
overnight at ambient temperature. The crude alkyne (220 mg, 100%)
was used directly in the next reaction.
[0725] .sup.1H NMR (CDCl.sub.3) .delta.: 7.46 (2H, d, J=8.2 Hz),
7.24 (2H, d, J=8.2 Hz), 3.23 (3H, s), 3.06 (1H, s), 1.22 (2H, m),
0.98 (2H, m).
[0726] Ethyl 4-[4-(1-methoxycyclopropyl)-phenylethynyl]-benzoate
(Compound 67, General Formula 2)
[0727] Using General Procedure F;
1-ethynyl-4-(1-methoxycyclopropyl)-benze- ne (Intermediate 61,
100.0 mg, 0.47 mmol) and ethyl-4-iodo benzoate (Reagent A, 141.0
mg, 0.51 mmol) in triethyl amine (6 mL) was treated with
copper(I)iodide (30.0 mg, 0.16 mmol) and sparged with argon for 5
minutes. Dichlorobis(triphenylphosphine)palladium(II) (109 mg, 0.16
mmol) was added and the reaction mixture was stirred overnight at
room temperature. Column chromatography (2-5% EtOAc-hexanes)
afforded 135.0 mg (90%) of the title compound as an orange
solid.
[0728] .sup.1H NMR (CDCl.sub.3) .delta.: 8.02 (2H, d, J=8.2 Hz),
7.58 (2H, d, J=8.8 Hz), 7.52 (2H, d, J=8.2 Hz), 7.28 (2H, d, J=8.8
Hz), 4.39 (2H, q, J=7.1 Hz), 3.25 (3H, s), 1.40 (3H, t, J=7.1 Hz),
1.23 (2H, m), 1.00 (2H, m).
[0729] Methyl
{4-[4-(1-methoxycyclopropyl)-phenylethynyl]-phenyl}-acetate
(Compound 68, General Formula 2)
[0730] Using General Procedure F;
1-ethynyl-4-(1-methoxycyclopropyl)-benze- ne (Intermediate 61,
120.0 mg, 0.56 mmol) and methyl-(4-iodophenyl)-acetat- e (Reagent
B, 154.0 mg, 0.56 mmol) in triethyl amine (6 mL) was treated with
copper(I)iodide (35.0 mg, 0.19 mmol) and sparged with argon for 5
minutes. Dichlorobis(triphenylphosphine)palladium(II) (130 mg, 0.19
mmol) was added and the reaction mixture was stirred overnight at
room temperature. Column chromatography (2-8% EtOAc-hexanes)
afforded 140.0 mg (78%) of the title compound as an orange
solid.
[0731] .sup.1H NMR (CDCl.sub.3) .delta.: 7.50 (4H, d, J=8.1 Hz),
7.28 (4H, d, J=8.1 Hz), 3.76 (3H, s), 3.64 (2H, s), 3.25 (3H, s),
1.22 (2H, m), 0.99 (2H, m).
[0732] 4-[4-(1-Methoxycyclopropyl)-phenylethynyl]-benzoic acid
(Compound 69, General Formula 2)
[0733] Using General Procedure I; a solution of ethyl
4-[4-(1-methoxycyclopropyl)-phenylethynyl]-benzoate (Compound 67,
110.0 mg,
[0734] 0.34 mmol) in ethanol (3 mL) and tetrahydrofuran (3 mL) was
treated with NaOH (160.0 mg, 4.0 mmols, 2.0 mL of a 2N aqueous
solution) and stirred overnight at room temperature. Work-up
afforded 85.0 mg (86%) of the title compound as an orange
solid.
[0735] .sup.1H NMR (CDCl.sub.3) .delta.: 8.05 (2H), 7.66 (2H), 7.56
(2H, d, J=8.5 Hz), 7.35 (2H, d, J=8.6 Hz), 3.22 (3H, s), 1.21 (2H,
m), 1.01 (2H, m).
[0736] {4-[4-(1-Methoxycyclopropyl)-phenylethynyl]-phenyl }-acetic
acid (Compound 70, General Formula 2)
[0737] Using General Procedure I; a solution of methyl
{4-[4-(1-methoxycyclopropyl)-phenylethynyl]-phenyl}-acetate
(Compound 68, 100.0 mg, 0.31 mmol) in ethanol (3 mL) and
tetrahydrofuran (3 mL) was treated with NaOH (160.0 mg, 4.0 mmols,
2.0 mL of a 2N aqueous solution) and stirred overnight at room
temperature. Work-up afforded 80.0 mg (84%) of the title compound
as an orange solid.
[0738] .sup.1H NMR (CDCl.sub.3) .delta.: 7.49 (4H), 7.27 (4H), 3.66
(2H, s), 3.25 (3H, s), 1.22 (2H, m), 0.99 (2H, m).
[0739] Isopropyl 4-bromobenzoate (Intermediate 62)
[0740] Using General Esterification Procedure A; 4-bromobenzoic
acid (1.50 g, 7.46 mmols) was combined with isopropyl alcohol to
give 1.76 g (97%) of the title compound as a colorless oil.
[0741] .sup.1H NMR (CDCl.sub.3) .delta.: 7.90 (2H, d, J=8.5 Hz),
7.57 (2H, d, J=8.5 Hz), 5.24 (1H, septet, J=6.2 Hz), 1.37 (6H, d,
J=6.2 Hz). 1-Bromo-4-(1-isopropoxyvinyl)-benzene (Intermediate
63)
[0742] Using General Procedure 1; isopropyl 4-bromobenzoate
(Intermediate 62, 780.0 mg, 3.20 mmols) and 6.4 mL of Tebbe's
Reagent (910.7 mg, 3.20 mmols) afforded 328.0 mg (43%) of the title
compound as a colorless oil after column chromatography (100%
hexanes).
[0743] .sup.1H NMR (CDCl.sub.3) .delta.: 7.46 (4H, m), 4.66 (1H, d,
J=2.6 Hz), 4.40 (1H, septet, J=6.2 Hz), 4.21 (1H, d, J=2.6 Hz),
1.34 (6H, d, J=6.2 Hz). 1-Bromo-4-(1-isopropoxycyclopropyl)-benzene
(Intermediate 64)
[0744] Using General Procedure 2;
1-bromo-4-(1-isopropoxyvinyl)-benzene (Intermediate 63, 328.0 mg,
1.36 mmols), Et.sub.2Zn (335.9 mg, 2.72 mmols), and CH.sub.2I.sub.2
(728.0 mg, 2.72 mmols) in 4.0 mL Et.sub.2O afforded 240.0 mg (70%)
of the title compound as a colorless oil after chromatography (3%
EtOAc-hexanes).
[0745] .sup.1H NMR (CDCl.sub.3) .delta.: 7.43 (2H, d, J=8.5 Hz),
7.27 (2H, d, J=8.5 Hz), 3.70 (1H, septet, J=6.2 Hz), 1.18 (2H, m),
1.06 (6H, d, J=6.2 Hz), 0.91 (2H, m).
[0746] [4-(1-Isopropoxycyclopropyl)-phenylethynyl]-trimethylsilane
(Intermediate 65)
[0747] Using General Procedure D;
1-bromo-4-(1-isopropoxycyclopropyl)-benz- ene (Intermediate 64,
240.0 mg, 0.94 mmol) in triethylamine (8 mL) was treated with
copper(I)iodide (18.0 mg, 0.094 mmol) and then sparged with argon
for 5 minutes. Trimethylsilyl acetylene (0.70 g, 7.1 mmols) was
then added followed by
dichlorobis-(triphenylphosphine)palladium(II) (66.0 mg, 0.094
mmol). The resulting reaction mixture was heated to 70.degree. C.
for 5 days. The title compound (250.0 mg, 98%) was isolated by
chromatography (0-3% EtOAc-hexanes) as an orange oil.
[0748] .sup.1H NMR (CDCl.sub.3) .delta.: 7.41 (2H, d, J=7.9 Hz),
7.31 (2H, d, J=7.9 Hz), 3.70 (1H, septet, J=6.2 Hz), 1.18 (2H, m),
1.05 (6H, d, J=6.2 Hz), 0.93 (2H, m), 0.94 (9H, s).
[0749] 1-Ethynyl-4-(1-isopropoxycyclopropyl)-benzene (Intermediate
66)
[0750] Using General Procedure E;
[4-(1-isopropoxycyclopropyl)-phenylethyn- yl]-trimethylsilane
(Intermediate 65, 260.0 mg, 0.96 mmol) in methanol (10 mL) was
treated with potassium carbonate (100.0 mg, 0.72 mmol) and stirred
overnight at ambient temperature. The crude alkyne (220 mg, 100%)
was used directly in the next reaction.
[0751] .sup.1H NMR (CDCl.sub.3) .delta.: 7.45 (2H, d, J=8.8 Hz),
7.35 (2H, d, J=8.8 Hz), 3.72 (1H, septet, J=6.2 Hz), 3.06 (1H, s),
1.20 (2H, m), 1.07 (6H, d, J=6.2 Hz), 0.95 (2H, m).
[0752] Ethyl 4-[4-(1-isopropoxycyclopropyl)-phenylethynyl]-benzoate
(Compound 71, General Formula 2)
[0753] Using General Procedure F;
1-ethynyl-4-(1-isopropoxycyclopropyl)-be- nzene (Intermediate 66,
114.0 mg, 0.57 mmol) and ethyl-4-iodo benzoate (Reagent A, 731.0
mg, 0.63 mmol) in triethylamine (8 mL) was treated with
copper(I)iodide (36.0 mg, 0.19 mmol) and sparged with argon for 5
minutes. Dichlorobis(triphenylphosphine)palladium(II) (133 mg, 0.19
mmol) was added and the reaction mixture was stirred overnight at
room temperature. Column chromatography (2-4% EtOAc-hexanes)
afforded 151.0 mg (76%) of the title compound as an orange
solid.
[0754] .sup.1H NMR (CDCl.sub.3) .delta.: 8.02 (2H, d, J=7.6 Hz),
7.58 (2H, d, J=7.6 Hz), 7.50 (2H, d, J=7.8 Hz), 7.39 (2H, d, J=7.8
Hz), 4.39 (2H, q, J=7.1 Hz), 3.74 (1H, septet, J=6.2 Hz), 1.40 (3H,
t, J=7.1 Hz), 1.22 (2H, m), 1.08 (6H, d, J=6.2 Hz), 0.97 (2H,
m).
[0755] Methyl
{4-[4-(1-isopropoxycyclopropyl)-phenylethynyl]-phenyl}-aceta- te
(Compound 72, General Formula 2)
[0756] Using General Procedure F;
1-ethynyl-4-(1-isopropoxycyclopropyl)-be- nzene (Intermediate 66,
95.0 mg, 0.45 mmol) and methyl-(4-iodophenyl)-acet- ate (Reagent B,
131.0 mg, 0.45 mmol) in triethylamine (6 mL) was treated with
copper(I)iodide (30.0 mg, 0.16 mmol) and sparged with argon for 5
minutes. Dichlorobis(triphenylphosphine)palladium(II) (111 mg, 0.16
mmol) was added and the reaction mixture was stirred overnight at
room temperature. Column chromatography (2-8% EtOAc-hexanes)
afforded 110.0 mg (70%) of the title compound as an orange oil.
[0757] .sup.1H NMR (CDCl.sub.3) .delta.: 7.20 (4H), 7.08 (2H, d,
J=7.0 Hz), 6.97 (2H, d, J=7.9 Hz), 3.45 (1H, septet, J=6.2 Hz),
3.41 (3H, s), 3.35 (2H, s), 0.91 (2H, m), 0.79 (6H, d, J=6.2 Hz),
0.68 (2H, m).
[0758] 4-[4-(1-Isopropoxycyclopropyl)-phenylethynyl]-benzoic acid
(Compound 73, General Formula 2)
[0759] Using General Procedure I; a solution of ethyl
4-[4-(1-isopropoxycyclopropyl)-phenylethynyl]-benzoate (Compound
71, 110.0 mg, 0.32 mmol) in ethanol (3 mL) and tetrahydrofuran (3
mL) was treated with NaOH (120.0 mg, 3.0 mmols, 3.0 mL of a 1N
aqueous solution) and stirred overnight at room temperature.
Work-up afforded 89.0 mg (88%) of the title compound as a yellow
solid.
[0760] .sup.1H NMR (CDCl.sub.3) .delta.: 8.06 (2H, d, J=8.2 Hz),
7.66 (2H, d, J=8.2 Hz), 7.55 (2H, d, J=8.2 Hz), 7.46 (2H, d, J=8.2
Hz), 3.73 (1H, septet, J=6.2 Hz), 1.18 (2H, m), 1.04 (6H, d, J=6.2
Hz), 0.99 (2H, m).
[0761] {4-[4-(1-Isopropoxycyclopropyl)-phenylethynyl]-phenyl
}-acetic acid (Compound 74, General Formula 2)
[0762] Using General Procedure I; a solution of methyl
{4-[4-(1-isopropoxycyclopropyl)-phenylethynyl]-phenyl}-acetate
(Compound 72, 80.0 mg, 0.23 mmol) in ethanol (3 mL) and
tetrahydrofuran (3 mL) was treated with NaOH (80.0 mg, 2.0 mmols,
2.0 mL of a 1N aqueous solution) and stirred overnight at room
temperature. Work-up afforded 48.0 mg (56%) of the title compound
as a solid.
[0763] .sup.1H NMR (CDCl.sub.3) .delta.: 7.20 (2H, d, J=8.2 Hz),
7.19 (2H, d, J=8.8 Hz), 7.09 (2H, d, J=8.8 Hz), 6.98 (2H, d, J=8.2
Hz), 3.46 (1H, septet, J=6.2 Hz), 3.37 (2H, s), 0.92 (2H, m), 0.79
(6H, d, J=6.2 Hz), 0.67 (2H, m).
[0764] Benzyl 4-bromobenzoate (Intermediate 67)
[0765] Using General Esterification Method B; 4-bromobenzoic acid
(2.01 g, 10.0 mmols), benzyl bromide (1.89 g, 11.1 mmols), and
K.sub.2CO.sub.3 (1.40 g, 10.0 mmols) afforded 2.33 g (80%) of the
title compound as a colorless solid after column chromatography
(3-10% EtOAc-hexanes).
[0766] .sup.1H NMR (CDCl.sub.3) .delta.: 7.89 (2H, d, J=8.5 Hz),
7.52 (2H, d, J=8.5 Hz), 7.43-7.31 (5H), 5.33 (2H, s).
[0767] 1-Bromo-4-(1-benzyloxyvinyl)-benzene (Intermediate 68)
[0768] Using General Procedure 1; benzyl 4-bromobenzoate
(Intermediate 67, 920.0 mg, 3.16 mmols) and 6.3 mL of Tebbe's
Reagent (897.0 mg, 3.16 mmols) afforded 640.0 mg (70%) of the title
compound after column chromatography (100% hexanes).
[0769] .sup.1H NMR (CDCl.sub.3) .delta.: 7.55-7.35 (9H), 4.95 (2H,
s), 4.73 (1H, d, J=2.9 Hz), 4.34 (1H, d, J=2.9 Hz).
[0770] 1-Bromo-4-(1-benzyloxycyclopropyl)-benzene (Intermediate
69)
[0771] Using General Procedure 2;
1-bromo-4-(1-benzyloxyvinyl)-benzene (Intermediate 68, 280. 0 mg,
0.97 mmol), Et.sub.2Zn (247.0 mg, 2.0 mmols), and CH.sub.2I.sub.2
(536.0 mg, 2.0 mmols) in 2.0 mL Et.sub.2O afforded 159.0 mg (53%)
of the title compound as a colorless solid after chromatography
(2-5% EtOAc-hexanes).
[0772] .sup.1H NMR (CDCl.sub.3) .delta.: 7.49-7.24 (9H), 4.41 (2H,
s), 1.29 (2H, m), 1.00 (2H, m).
[0773] [4-(1-Benzyloxycyclopropyl)-phenylethynyl]-trimethylsilane
(Intermediate 70)
[0774] Using General Procedure D;
1-bromo-4-(1-benzyloxycyclopropyl)-benze- ne (Intermediate 69,
160.0 mg, 0.53 mmol) in triethylamine (5 mL) was treated with
copper(I)iodide (10.0 mg, 0.05 mmol) and then sparged with argon
for 5 minutes. Trimethylsilylacetylene (0.70 g, 7.1 mmols) was then
added followed by dichlorobis-(triphenylphosphine)palladium(II)
(37.0 mg, 0.05 mmol). The resulting reaction mixture was heated to
70.degree. C. for 5d. The title compound (150.0 mg, 83%) was
isolated by chromatography (0-3% EtOAc-hexanes) as a pale-yellow
oil.
[0775] .sup.1H NMR (CDCl.sub.3) .delta.: 7.21 (3H, m), 7.09-7.01
(6H, m), 4.18 (2H, s), 1.07 (2H, m), 0.79 (2H, m), 0.02 (9H,
s).
[0776] 1-Ethynyl-4-(1-benzyloxycyclopropyl)-benzene (Intermediate
71)
[0777] Using General Procedure E;
[4-(1-benzyloxycyclopropyl)-phenylethyny- l]-trimethylsilane
(Intermediate 70, 150.0 mg, 0.47 mmols) in methanol (6 mL) was
treated with potassium carbonate (100.0 mg, 0.72 mmol) and stirred
overnight at ambient temperature. The crude alkyne (15 mg, 100%)
was used directly in the next reaction.
[0778] .sup.1H NMR (CDCl.sub.3) .delta.: 7.67-7.50 (2H, d, J=8.2
Hz), 7.34-7.26 (7H, m), 4.43 (2H, s), 3.07 (1H, s), 1.32 (2H, m),
1.04 (2H, m).
[0779] Ethyl 4-[4-(1-benzyloxycyclopropyl)-phenylethynyl]-benzoate
(Compound 75, General Formula 2)
[0780] Using General Procedure F;
1-ethynyl-4-(1-benzyloxycyclopropyl)-ben- zene (Intermediate 71,
60.0 mg, 0.24 mmol) and ethyl-4-iodo benzoate (Reagent A, 72.0 mg,
0.26 mmol) in triethylamine (4 mL) was treated with copper(I)iodide
(17.0 mg, 0.09 mmol) and sparged with argon for 5 minutes.
Dichlorobis(triphenylphosphine)palladium(II) (61 mg, 0.09 mmol) was
added and the reaction mixture was stirred overnight at room
temperature. Column chromatography (2-4% EtOAc-hexanes) afforded
85.0 mg (91%) of the title compound as an orange oil.
[0781] .sup.1H NMR (CDCl.sub.3) .delta.: 8.03 (2H, d, J=8.2 Hz),
7.62-7.54 (4H, m), 7.39-7.26 (7H, m), 4.47 (2H, s), 4.40 (2H, q,
J=7.1 Hz), 1.42 (3H, t, J=7.1 Hz), 1.36 (2H, m), 1.07 (2H, m).
[0782] Methyl { 4-[4-(1-benzyloxycyclopropyl)-phenylethynyl]
-phenyl }-acetate (Compound 76, General Formula 2)
[0783] Using General Procedure F;
1-ethynyl-4-(1-benzyloxycyclopropyl)-ben- zene (Intermediate 71,
60.0 mg, 0.20 mmol) and methyl-(4-iodophenyl)-aceta- te (Reagent B,
66.0 mg, 0.24 mmol) in triethylamine (5 mL) was treated with
copper(I)iodide (15.0 mg, 0.08 mmol) and sparged with argon for 5
minutes. Dichlorobis(triphenylphosphine)palladium(II) (56 mg, 0.08
mmol) was added and the reaction mixture was stirred overnight at
room temperature. Column chromatography (2-7% EtOAc-hexanes)
afforded 64.0 mg (81%) of the title compound as a yellow oil.
[0784] .sup.1H NMR (CDCl.sub.3) .delta.: 7.52-7.47 (4H, m),
7.37-7.25 (9H, m), 4.44 (2H, s), 3.70 (3H, s), 3.64 (2H, s), 1.32
(2H, m), 1.06 (2H, m).
[0785] 4-[4-(I-Benzyloxycyclopropyl)-phenylethynyl]-benzoic acid
(Compound 77, General Formula 2)
[0786] Using General Procedure I; a solution of ethyl
4-[4-(1-benzyloxycyclopropyl)-phenylethynyl]-benzoate (Compound 75,
78.0 mg, 0.20 mmol) in ethanol (3 mL) and tetrahydrofuran (3 mL)
was treated with NaOH (80.0 mg, 2.0 mmols, 2.0 mL of a 1N aqueous
solution) and stirred overnight at room temperature. Work-up
afforded 65.0 mg (89%) of the title compound as a solid.
[0787] .sup.1H NMR (CDCl.sub.3) .delta.: 7.97 (2H, d, J=8.5 Hz),
7.67 (2H, d, J=8.7 Hz), 7.58 (2H, d, J=8.5 Hz), 7.41-7.28 (7H, m),
4.44 (2H, s), 1.33 (2H, m), 1.12 (2H, m).
[0788] {4-[4-(1-Benzyloxycyclopropyl)-phenylethynyl]l-phenyl
}-acetic acid (Compound 78, General Formula 2)
[0789] Using General Procedure I; a solution of methyl
{4-[4-(1-benzyloxycyclopropyl)-phenylethynyl]-phenyl}-acetate
(Compound 76, 45.0 mg, 0.11 mmol) in ethanol (3 mL) and
tetrahydrofuran (3 mL) was treated with NaOH (80.0 mg, 2.0 mmols,
2.0 mL of a 1N aqueous solution) and stirred overnight at room
temperature. Work-up afforded 35.0 mg (81%) of the title compound
as a pale-yellow solid.
[0790] .sup.1H NMR (CDCl.sub.3) .delta.: 7.49 (4H, m), 7.37-7.25
(9H, m), 4.44 (2H, s), 3.66 (2H, s), 1.32 (2H, m), 1.05 (2H,
m).
[0791] Benzyl 4-bromo-2-methylbenzoate (Intermediate 72)
[0792] Using General Esterification Method C;
2-methyl-4-bromo-benzoic acid (2.15 g, 10.0 mmols) was refluxed for
3 h with 10 mL SOCl.sub.2. The resulting solution concentrated
under reduced pressure and the crude acyl chloride was combined
with benzyl alcohol (1.08 g, 10.0 mmols) and pyridine (1.6 mL, 20.0
mmols) to give the title compound (2.4 g, 80%) after work-up and
column chromatography (2-5% EtOAc-hexanes) as a colorless oil.
[0793] .sup.1H NMR (CDCl.sub.3) .delta.: 7.81 (1H, d, J=8.5 Hz),
7.41-7.33 (7H, m), 5.32 (2H, s), 2.57 (3H, s).
[0794] 4-Bromo-1-(1-benzyloxyvinyl)-2-methylbenzene (Intermediate
73)
[0795] Using General Procedure 1; benzyl 4-bromo-2-methylbenzoate
(Intermediate 72, 840.0 mg, 2.77 mmols) and 5.4 mL of Tebbe's
Reagent (788.0 mg, 2.77 mmols) afforded 640.0 mg (76%) of the title
compound after column chromatography (100% hexanes).
[0796] .sup.1H NMR (CDCl.sub.3) .delta.: 7.38-7.19 (8H, m), 4.88
(2H, s), 4.45 (1H, d, J=2.6 Hz), 4.25 (2H, d, J=2.6 Hz), 2.35 (3H,
s).
[0797] 4-Bromo-1-(1-benzyloxycyclopropyl)-2-methyl-benzene
(Intermediate 74)
[0798] Using General Procedure 2;
4-bromo-1-(1-benzyloxyvinyl)-2-methyl-be- nzene (Intermediate 73,
400.0 mg, 1.32 mmols), Et.sub.2Zn (325.0 mg, 2.63 mmols), and
CH.sub.2I.sub.2 (704.0 mg, 2.63 mmols) in 4 mL Et.sub.2O afforded
380.0 mg (90%) of the title compound as a colorless oil after
chromatography (2-5% EtOAc-hexanes).
[0799] .sup.1H NMR (CDCl.sub.3) .delta.: 7.42-7.20 (8H, m), 4.31
(2H, s), 2.58 (3H, s), 1.25 (2H, m), 0.94 (2H, m).
[0800]
[4-(1-Benzyloxycyclopropyl)-3-methyl-phenylethynyl]-trimethylsilane
(Intermediate 75)
[0801] Using General Procedure D;
4-bromo-1-(1-benzyloxycyclopropyl)-2-met- hyl-benzene (Intermediate
74, 320.0 mg, 1.00 mmol) in triethylamine (8 mL) was treated with
copper(I)iodide (19.0 mg, 0.1 mmol) and then sparged with argon for
5 minutes. Trimethylsilylacetylene (0.70 g, 7.1 mmols) was then
added followed by dichlorobis-(triphenylphosphine)palladium(II)
(70.0 mg, 0.05 mmol). The resulting reaction mixture was heated to
70.degree. C. for 5d. The title compound (300.0 mg, 89%) was
isolated by chromatography (0-2% EtOAc-hexanes).
[0802] .sup.1H NMR (CDCl.sub.3) .delta.: 7.34-7.13 (8H, m), 4.24
(2H, s), 2.52 (3H, s), 1.20 (2H, m), 0.88 (2H, m), 0.25 (9H,
s).
[0803] 4-Ethynyl-1-(1-benzyloxycyclopropyl)-2-methyl-benzene
(Intermediate 76)
[0804] Using General Procedure E;
[4-(1-benzyloxycyclopropyl)-3-methyl-phe-
nylethynyl]-trimethylsilane (Intermediate 75, 300.0 mg, 0.95 mmols)
in methanol (6 mL) was treated with potassium carbonate (120.0 mg,
0.87 mmol) and stirred overnight at ambient temperature. The crude
alkyne (185 mg, 79%) was used directly in the next reaction.
[0805] .sup.1H NMR (CDCl.sub.3) .delta.: 7.37-7.16 (8H, m), 4.27
(2H, s), 3.07 (1H, s), 2.55 (3H, s), 1.21 (2H, m), 0.92 (2H,
m).
[0806] Ethyl
4-[4-(1-benzyloxycyclopropyl)-3-methyl-phenylethynyl]-benzoat- e
(Compound 79, General Formula 2)
[0807] Using General Procedure F;
1-ethynyl-4-(1-benzyloxycyclopropyl)-3-m- ethyl-benzene
(Intermediate 76, 90.0 mg, 0.34 mmol) and ethyl-4-iodo benzoate
(Reagent A, 95.0 mg, 0.34 mmol) in triethylamine (6 mL) was treated
with copper(I)iodide (23.0 mg, 0.12 mmol) and sparged with argon
for 5 minutes. Dichlorobis(triphenylphosphine)palladium(II) (80 mg,
0.11 mmol) was added and the reaction mixture was stirred overnight
at room temperature. Column chromatography (2-4% EtOAc-hexanes)
afforded 68.0 mg (54%) of the title compound.
[0808] .sup.1H NMR (CDCl.sub.3) .delta.: 8.03 (2H, d, J=8.2 Hz),
7.58 (2H, d, J=8.2 Hz), 7.33-7.16 (8H, m), 4.39 (2H, q, J=7.1 Hz),
4.29 (2H, s), 2.57 (3H, s), 1.40 (3H, t, J=7.1 Hz), 1.22 (2H, m),
0.93 (2H, m).
[0809] Methyl
{4-[4-(1-benzyloxycyclopropyl)-3-methyl-phenylethynyl]-pheny-
l}-acetate (Compound 80, General Formula 2)
[0810] Using General Procedure F;
1-ethynyl-4-(1-benzyloxycyclopropyl)-3-m- ethyl-benzene
(Intermediate 76, 90.0 mg, 0.34 mmol) and
methyl-(4-iodophenyl)-acetate (Reagent B, 95.0 mg, 0.34 mmol) in
triethylamine (5 mL) was treated with copper(I)iodide (22.0 mg,
0.11 mmol) and sparged with argon for 5 minutes.
Dichlorobis(triphenylphosphin- e)palladium(II) (80 mg, 0.11 mmol)
was added and the reaction mixture was stirred overnight at room
temperature. Column chromatography (2-4% EtOAc-hexanes) afforded
90.0 mg (71%) of the title compound as a pale-yellow oil.
[0811] .sup.1H NMR (CDCl.sub.3) .delta.: 7.49 (2H, d, J=8.2 Hz),
7.32-7.16 (1OH, m), 4.28 (2H, s), 3.70 (3H, s), 3.64 (2H, s), 2.56
(3H, s), 1.22 (2H, m), 0.92 (2H, m).
[0812] 4-[4-(l
-Benzyloxycyclopropyl)-3-methyl-phenylethynyl]-benzoic acid
(Compound 81, General Formula 2)
[0813] Using General Procedure I; a solution of ethyl
4-[4-(1-benzyloxycyclopropyl)-3-methyl-phenylethynyl]-benzoate
(Compound 79, 68.0 mg, 0.17 mmol) in ethanol (3 mL) and
tetrahydrofuran (3 mL) was treated with NaOH (360.0 mg, 9.0 mmols,
3.0 mL of a 3N aqueous solution) and stirred overnight at room
temperature. Work-up afforded 48.0 mg (76%) of the title compound
as a solid.
[0814] .sup.1H NMR (CDCl.sub.3) .delta.: 8.10 (2H, d, J=8.1 Hz),
7.63 (2H, d, J=8.1 Hz), 7.44-7.16 (8H, m), 4.29 (2H, m), 2.58 (3H,
s), 1.24 (2H, m), 0.94 (2H, m). {4-[4-(
I-Benzyloxycyclopropyl)-3-methyl-phenylethynyl]- -phenyl}-acetic
acid (Compound 82, General Formula 2)
[0815] Using General Procedure I; a solution of methyl
{4-[4-(1-benzyloxycyclopropyl)-3-methyl-phenylethynyl]-phenyl}-acetate
(Compound 80, 75.0 mg, 0.18 mmol) in ethanol (3 mL) and
tetrahydrofuran (3 mL) was treated with NaOH (120.0 mg, 3.0 mmols,
3.0 mL of a 1N aqueous solution) and stirred overnight at room
temperature. Work-up afforded 30.0 mg (40%) of the title
compound.
[0816] .sup.1H NMR (CDCl.sub.3) .delta.: 7.51 (2H, d, J=8.2 Hz),
7.42 (1H, s), 7.33-7.17 (9H, m), 4.36 (2H, s), 3.67 (2H, s), 2.57
(3H, s), 1.23 (2H, m), 0.94 (2H, m). Isopropyl
3-methyl-4-bromobenzoate (Intermediate 77)
[0817] Using General Esterification Procedure A;
4-bromo-2-methylbenzoic acid (1.6 g, 7.4 mmols) was combined with
isopropyl alcohol to give 1.5 g (79%) of the title compound as a
colorless oil.
[0818] .sup.1H NMR (CDCl.sub.3) .delta.: 7.76 (1H, d, J=8.2 Hz),
7.40 (1H, d, J=7.4 Hz), 7.37 (1H, dd, J=1.4, 8.2 Hz), 5.23 (1H,
septet, J=6.2 Hz), 2.57 (3H, s), 1.37 (6H, d, J=6.2 Hz).
[0819] 4-Bromo-1-(1-isopropoxyvinyl)-2-methyl-benzene (Intermediate
78)
[0820] Using General Procedure 1; isopropyl
2-methyl-4-bromobenzoate (Intermediate 77, 800.0 mg, 3.11 mmols)
and 6.2 mL of Tebbe's Reagent (885.2 mg, 3.11 mmols) afforded 595.0
mg (75%) of the title compound as a colorless oil after column
chromatography (100% hexanes).
[0821] .sup.1H NMR (CDCl.sub.3) .delta.: 7.31-7.25 (2H, m), 7.16
(1H, d, J=8.2 Hz), 4.34 (1H, septet, J=6.0 Hz), 4.31 (1H, d, J=2.1
Hz), 4.18 (1H, d, J=2.1 Hz), 2.33 (3H, s), .1.31 (6H, d, J=6.0
Hz).
[0822] 4-Bromo-1-(1-isopropoxycyclopropyl)-2-methyl-benzene
(Intermediate 79)
[0823] Using General Procedure 2;
4-bromo-1-(1-isopropoxyvinyl)-2-methyl-b- enzene (Intermediate 78,
389.0 mg, 1.53 mmols), Et.sub.2Zn (376.6 mg, 3.05 mmols), and
CH.sub.2I.sub.2 (817.0 mg, 3.05 mmols) in 3.0 mL Et.sub.2O afforded
340.0 mg (84%) of the title compound as a colorless oil after
chromatography (3% EtOAc-hexanes).
[0824] .sup.1H NMR (CDCl.sub.3) .delta.: 7.33 (1H, d, J=2.3 Hz),
7.24 (1H, dd, J=2.3, 8.2 Hz), 7.13 (1H, d, J=8.2 Hz), 3.57 (1H,
septet, J=6.1 Hz), 2.49 (3H, s), 1.00 (2H, m), 0.97 (6H, d, J=6.1
Hz), 0.82 (2H, m).
[0825]
[4-(1-Isopropoxycyclopropyl)-3-methyl-phenylethynyl]-trimethylsilan-
e (Intermediate 80)
[0826] Using General Procedure D;
4-bromo-1-(1-isopropoxycyclopropyl)-2-me- thyl-benzene
(Intermediate 79, 250.0 mg, 0.95 mmol) in triethylamine (8 mL) was
treated with copper(I)iodide (19.0 mg, 0.10 mmol) and then sparged
with argon for 5 minutes. Trimethylsilylacetylene (0.70 g, 7.1
mmols) was then added followed by
dichlorobis-(triphenylphosphine)palladi- um(II) (70.0 mg, 0.1
mmol). The resulting reaction mixture was heated to 70.degree. C.
for 5d. The title compound (250.0 mg, 91%) was isolated by
chromatography (0-3% EtOAc-hexanes).
[0827] .sup.1H NMR (CDCl.sub.3) .delta.: 7.32-7.17 (3H, m), 3.56
(1H, septet, J=6.2 Hz), 2.48 (3H, s), 1.00 (2H, m), 0.95 (6H, d,
J=6.2 Hz), 0.83 (2H, m), 0.24 (9H, s).
[0828] 4-Ethynyl-1-(1-isopropoxycyclopropyl)-2-methyl-benzene
(Intermediate 81)
[0829] Using General Procedure E;
[4-(1-isopropoxycyclopropyl)-3-methyl-ph-
enylethynyl]-trimethylsilane (Intermediate 80, 250.0 mg, 0.87 mmol)
in methanol (10 mL) was treated with potassium carbonate (100.0 mg,
0.72 mmol) and stirred overnight at ambient temperature. The crude
alkyne (180 mg, 98%) was used directly in the next reaction.
[0830] .sup.1H NMR (CDCl.sub.3) .delta.: 7.32 (1H, s), 7.23 (2H,
m), 3.57 (1H, septet, J=6.2 Hz), 3.05 (1H, s), 2.50 (3H, s), 1.11
(2H, m), 0.96 (6H, d, J=6.2 Hz), 0.83 (2H, m).
[0831] Ethyl
4-[4-(1-isopropoxycyclopropyl)-3-methyl-phenylethynyl]-benzoa- te
(Compound 83, General Formula 2)
[0832] Using General Procedure F;
4-ethynyl-1-(1-isopropoxycyclopropyl)-3-- methyl-benzene
(Intermediate 81, 80.0 mg, 0.13 mmol) and ethyl-4-iodo benzoate
(Reagent A, 100.0 mg, 0.36 mmol) in triethylamine (5 mL) was
treated with copper(I)iodide (25.0 mg, 0.13 mmol) and sparged with
argon for 5 minutes. Dichlorobis(triphenylphosphine)-palladium(II)
(91 mg, 0.13 mmol) was added and the reaction mixture was stirred
overnight at room temperature. Column chromatography (2-4%
EtOAc-hexanes) afforded 75.0 mg (56%) of the title compound as an
orange solid.
[0833] .sup.1H NMR (CDCl.sub.3) .delta.: 8.02 (2H, d, J=8.2 Hz),
7.57 (2H, d, J=8.2 Hz), 7.39 (1H, s), 7.29-7.20 (2H, m), 4.39 (2H,
q, J=7.1 Hz), 3.60 (1H, septet, J=6.2 Hz), 1.40 (3H, t, J=7.1 Hz),
1.13 (2H, m), 0.97 (6H, d, J=6.2 Hz), 0.87 (2H, m).
[0834] Methyl
{4-[4-(1-isopropoxycyclopropyl)-3-methyl-phenylethynyl]-phen-
yl}-acetate (Compound 84, General Formula 2)
[0835] Using General Procedure F;
1-ethynyl-4-(1-isopropoxycyclopropyl)-3-- methyl-benzene
(Intermediate 81, 100.0 mg, 0.47 mmol) and
methyl-(4-iodophenyl)-acetate (Reagent B, 129.0 mg, 0.45 mmol) in
triethylamine (6 mL) was treated with copper(I)iodide (30.0 mg,
0.16 mmol) and sparged with argon for 5 minutes.
Dichlorobis(triphenylphosphin- e)palladium(II) (110 mg, 0.16 mmol)
was added and the reaction mixture was stirred overnight at room
temperature. Column chromatography (2-4% EtOAc-hexanes) afforded
120.0 mg (71%) of the title compound.
[0836] .sup.1H NMR (CDCl.sub.3) .delta.: 7.48 (2H, d, J=8.5 Hz),
7.36 (1H, s), 7.29-7.22 (4H, m), 3.70 (3H, s), 3.63 (2H, s), 3.60
(1H, septet, J=6.2 Hz), 2.52 (3H, s), 1.09 (2H, m), 0.97 (6H, d,
J=6.2 Hz), 0.86 (2H, m).
[0837]
4-[4-(1-Isopropoxycyclopropyl)-3-methyl-phenylethynyl]-benzoic acid
(Compound 85, General Formula 2)
[0838] Using General Procedure I; a solution of ethyl
4-[4-(1-isopropoxycyclopropyl)-3-methyl-phenylethynyl]-benzoate
(Compound 83, 60.0 mg, 0.17 mmol) in ethanol (2 mL) and
tetrahydrofuran (2 mL) was treated with NaOH (80.0 mg, 2.0 mmols,
2.0 mL of a 1N aqueous solution) and stirred overnight at room
temperature. Work-up afforded 38.0 mg (69%) of the title compound
as a colorless solid.
[0839] .sup.1H NMR (d.sub.6-acetone) .delta.: 8.06 (2H, d, J=8.5
Hz), 7.66 (2H, d, J=8.5 Hz), 7.42 (1H, s), 7.35 (2H, m), 3.59 (1H,
septet, J=6.2 Hz), 2.52 (3H, s), 1.07 (2H, m), 0.93 (6H, d, J=6.2
Hz), 0.88 (2H, m).
[0840]
{4-[4-(1-Isopropoxycyclopropyl)-3-methyl-phenylethynyl]-phenyl}-ace-
tic acid (Compound 86, General Formula 2)
[0841] Using General Procedure I; a solution of methyl
{4-[4-(1-isopropoxycyclopropyl)-3-methyl-phenylethynyl]-phenyl
}-acetate (Compound 84, 100.0 mg, 0.28 mmol) in ethanol (3 mL) and
tetrahydrofuran (3 mL) was treated with NaOH (120.0 mg, 3.0 mmols,
3.0 mL of a 1N aqueous solution) and stirred overnight at room
temperature. Work-up afforded 60.0 mg (62%) of the title compound
as a colorless solid.
[0842] .sup.1H NMR (CDCl.sub.3) .delta.: 7.48 (2H, d, J=7.6 Hz),
7.36 (1H, s), 7.25 (4H, m), 3.65 (2H, s), 3.60 (1H, septet, J=6.2
Hz), 2.51 (3H, s), 1.12 (2H, m), 0.97 (6H, d, J=6.2 Hz), 0.86 (2H,
m).
[0843] 2,2-Dimethylpropyl 2-methyl-4-bromobenzoate (Intermediate
82)
[0844] Using General Esterification Method C;
2-methyl-4-bromo-benzoic acid (1.82 g, 8.47 mmols) was refluxed for
3 h with 10 mL SOCl.sub.2. The resulting solution was concentrated
under reduced pressure and the crude acyl chloride combined with
2,2-dimethylpropanol (0.75 g, 8.47 mmols) and pyridine (1.4 mL,
16.9 mmols) to give the title compound (1.64 g, 68%) after work-up
and column chromatography (2-5% EtOAc-hexanes) as a colorless
oil.
[0845] .sup.1H NMR (CDCl.sub.3) .delta.: 7.81 (1H, d, J=8.2 Hz),
7.42 (1H, d, J=2.0 Hz), 7.39 (1H, dd, J=2.0, 8.2 Hz), 3.99 (2H, s),
2.60 (3H, s), 1.03 (9H, s).
[0846] 4-Bromo-1-[1-(2 2-dimethylpropyloxy)-vinyl]-2-methyl-benzene
(Intermediate 83)
[0847] Using General Procedure 1; 2,2-dimethylpropyl
2-methyl-4-bromobenzoate (Intermediate 82, 820.0 mg, 2.87 mmols)
and 5.8 mL of Tebbe's Reagent (817.0 mg, 2.87 mmols) afforded 800.0
mg (98%) of the title compound as a colorless oil after column
chromatography (100% hexanes).
[0848] .sup.1H NMR (CDCl.sub.3) .delta.: 7.32 (1H, d, J=2.0 Hz),
7.28 (1H, dd, J=2.0, 8.2 Hz), 7.18 (1H, d, J=8.2 Hz), 4.27 (1H, d,
J=2.1 Hz),4.10 (1H, d, J=2.1 Hz), 3.43 (2H, s), 2.33 (3H, s), 0.98
(9H, s).
[0849]
4-Bromo-1-[1-(2,2-dimethylpropyloxy)-cyclopropyl]-2-methyl-benzene
(Intermediate 84)
[0850] Using General Procedure 2;
4-bromo-1-[1-(2,2-dimethylpropyloxy)-cyc-
lopropyl]-2-methyl-benzene (Intermediate 83, 400.0 mg, 1.43 mmols),
Et.sub.2Zn (353.2 mg, 2.86 mmols), and CH.sub.2I.sub.2 (760.0 mg,
2.86 mmols) in 3.0 mL Et.sub.2O afforded 370.0 mg (87%) of the
title compound as a colorless oil after chromatography (3%
EtOAc-hexanes).
[0851] .sup.1H NMR (CDCl.sub.3) .delta.: 7.36 (1H, s),7.27 (1H, d,
J=8.5 Hz), 7.09 (1H, d, J=7.9 Hz), 2.86 (2H, s), 2.52 (3H, s), 1.08
(2H, m), 0.83 (2H, m), 0.80 (9H, s).
[0852] [4-[ 1-[
1-(2,2-Dimethylpropyloxy)-cyclopropyl]-3-methyl-phenylethy-
nyl]]-trimethylsilane (Intermediate 84a)
[0853] Using General Procedure D;
4-bromo-1-[1-(2,2-dimethylpropyloxy)-cyc-
lopropyl]-2-methyl-benzene (Intermediate 84, 255.0 mg, 0.86 mmol)
in triethylamine (8 mL) was treated with copper(I)iodide (17.0 mg,
0.09 mmol) and then sparged with argon for 5 minutes.
Trimethylsilylacetylene (0.70 g, 7.1 mmols) was then added followed
by dichlorobis-(triphenylphos- phine)palladium(II) (63.0 mg, 0.09
mmol). The resulting reaction mixture was heated to 70.degree. C.
for 5d. The title compound (220.0 mg, 81%) was isolated by
chromatography (1-2% EtOAc-hexanes).
[0854] .sup.1H NMR (CDCl.sub.3) .delta.: 7.30 (1H, s), 7.21 (1H, d,
J=7.6 Hz), 7.12 (1H, d, J=8.6 Hz), 2.80 (2H, s), 2.47 (3H, s), 1.05
(2H, m), 0.82 (2H, m), 0.75 (9H, s), 0.24 (9H, s).
[0855]
4-Ethynyl-1-[1-(2,2-dimethylpropyloxy)-cyclopropyl]-2-methyl-benzen-
e (Intermediate 85)
[0856] Using General Procedure E;
[4-[1-[1-(2,2-dimethylpropyloxy)-cyclopr-
opyl]]-3-methyl-phenylethynyl]-trimethylsilane (Intermediate 84a,
220.0 mg, 0.83 mmol) in methanol (10 mL) was treated with potassium
carbonate (80.0 mg, 0.58 mmol) and stirred overnight at ambient
temperature. The crude alkyne (155 mg, 76%) was used directly in
the next reaction.
[0857] .sup.1H NMR (CDCl.sub.3) .delta.: 7.32 (1H, s), 7.24 (1H, d,
J=7.1 Hz), 7.15 (1H, d, J=7.1 Hz), 3.04 (1H, s), 2.83 (2H, s), 2.49
(3H, s), 1.06 (2H, m), 0.83 (2H, m), 0.76 (9H, s).
[0858] Ethyl
4-[4-[1-(2,2-dimethylpropyloxy)-cyclopropy]-3-methyl-phenylet-
hynyl]-benzoate (Compound 87, General Formula 2)
[0859] Using General Procedure F;
4-ethynyl-1-[1-(2,2-dimethylpropyloxy)-c-
yclopropyl]-3-methyl-benzene (Intermediate 85, 75.0 mg, 0.31 mmol)
and ethyl-4-iodo benzoate (Reagent A, 86.0 mg, 0.31 mmol) in
triethylamine (5 mL) was treated with copper(I)iodide (21.0 mg,
0.11 mmol) and sparged with argon for 5 minutes.
Dichlorobis(triphenylphosphine)-palladium(II) (78 mg, 0.11 mmol)
was added and the reaction mixture was stirred overnight at room
temperature. Column chromatography (2-4% EtOAc-hexanes) afforded
60.0 mg (50%) of the title compound as an orange solid.
[0860] .sup.1H NMR (CDCl.sub.3) .delta.: 8.02 (2H, d, J=8.4 Hz),
7.56 (2H, d, J=8.4 Hz), 7.38 (1H, s), 7.30 (1H, dd, J=1.1, 8.0 Hz),
7.20 (1H, d, J=8.0 Hz), 4.38 (2H, q, J=7.1 Hz), 2.84 (2H, s), 2.52
(3H, s), 1.40 (3H, t, J=7.1 Hz), 1.07 (2H, m), 0.84 (2H, m), 0.77
(9H, s).
[0861] Methyl
{4-[4-[1-(2,2-dimethylpropyloxy-cyclopropyl]-3-methyl-phenyl-
ethynyl]-phenyl}-acetate (Compound 88, General Formula 2)
[0862] Using General Procedure F;
4-ethynyl-1-[1-(2,2-dimethylpropyloxy)-c-
yclopropyl]-3-methyl-benzene (Intermediate 85, 75.0 mg, 0.31 mmol)
and methyl-(4-iodophenyl)-acetate (Reagent B, 86.0 mg, 0.31 mmol)
in triethylamine (6 mL) was treated with copper(I)iodide (21.0 mg,
0.11 mmol) and sparged with argon for 5 minutes.
[0863] Dichlorobis(triphenylphosphine)palladium(II) (78 mg, 0.11
mmol) was added and the reaction mixture was stirred overnight at
room temperature. Column chromatography (2-4% EtOAc-hexanes)
afforded 100.0 mg (83%) of the title compound.
[0864] .sup.1H NMR (CDCl.sub.3) .delta.: 7.48 (2H, d, J=7.9 Hz),
7.36-7.24 (4H, m), 7.18 (1H, d, J=7.9 Hz), 3.70 (3H, s), 3.63 (2H,
s), 2.84 (2H, s), 2.51 (3H, s), 1.07 (2H, m);0.83 (2H, m), 0.77
(9H, s).
[0865]
4-[4-[1-(2,2-Dimethylpropyloxy)-cyclopropyl]-3-methyl-phenylethynyl-
]-benzoic acid (Compound 89, General Formula 2)
[0866] Using General Procedure I; a solution of ethyl
4-[4-[1-(2,2-dimethylpropyloxy)-cyclopropyl]-3-methyl-phenylethynyl]-benz-
oate (Compound 87, 60.0 mg, 0.15 mmol) in ethanol (3 mL) and
tetrahydrofuran (3 mL) was treated with NaOH (120.0 mg, 3.0 mmols,
3.0 mL of a 1N aqueous solution) and stirred overnight at room
temperature. Work-up afforded 24.0 mg (43%) of the title compound
as a colorless solid.
[0867] .sup.1H NMR (CDCl.sub.3) .delta.: 8.06 (2H, d, J=7.9 Hz),
7.65 (2H, d, J=7.9 Hz), 7.42 (1H, s), 7.33 (2H, m), 2.89 (2H, s),
2.53 (3H, s), 1.07 (2H, m), 0.90 (2H, m), 0.77 (9H, s).
[0868]
{4-[4-[1-(2,2-Dimethylpropyloxy)-cyclopropyl]-3-methyl-phenylethyny-
l]-phenyl}-acetic acid (Compound 90, General Formula 2)
[0869] Using General Procedure I; a solution of methyl
{4-[4-[1-(2,2-dimethylpropyloxy)-cyclopropyl]-3-methyl-phenylethynyl]-phe-
nyl}-acetate (Compound 88, 95.0 mg, 0.24 mmol) in ethanol (3 mL)
and tetrahydrofuran (3 mL) was treated with NaOH (120.0 mg, 3.0
mmols, 3.0 mL of a 1N aqueous solution) and stirred overnight at
room temperature. Work-up afforded 49.0 mg (53%) of the title
compound as a colorless solid.
[0870] .sup.1H NMR (CDCl.sub.3) .delta.: 7.49 (2H, d, J=8.2 Hz),
7.36 (1H, s), 7.27 (3H, m), 7.18 (1H, d, J=7.9 Hz), 3.66 (2H, s),
2.84 (2H, s), 2.51 (3H, s), 1.07 (2H, m), 0.83 (2H, m), 0.77 (9H,
s).
[0871] Benzyl 4-bromo-2-ethyl-benzoate (Intermediate 86)
[0872] Using General Esterification Method B;
4-bromo-2-ethyl-benzoic acid (0.98 g, 4.25 mmols), benzyl bromide
(0.80 g, 4.68 mmols), and K.sub.2CO.sub.3 (0.64 g, 4.68 mmols)
afforded 1.0 g (74%) of the title compound after column
chromatography (0-3% EtOAc-hexanes).
[0873] .sup.1H NMR (CDCl.sub.3) .delta.: 7.76 (1H, d, J=8.5 Hz),
7.41-7.33 (7H, m), 5.32 (2H, s), 2.95 (2H, q, J=7.6 Hz), 1.20 (3H,
t, J=7.6 Hz).
[0874] 4-Bromo-1-(1-benzyloxyvinyl)-2-ethyl-benzene (Intermediate
87)
[0875] Using General Procedure 1; benzyl 4-bromo-2-ethylbenzoate
(Intermediate 86, 1.20 g, 3.78 mmols) and 7.6 mL of Tebbe's Reagent
(1.08 g, 3.78 mmols) afforded 800.0 mg (66%) of the title compound
after column chromatography (100% hexanes).
[0876] .sup.1H NMR (CDCl.sub.3) .delta.: 7.37-7.17 (8H, m), 4.88
(2H, s), 4.43 (1H, d, J=2.1 Hz), 4.25 (1H, d, J=2.1 Hz), 2.71 (2H,
q, J=7.6 Hz), 1.18 (3H, t, J=7.6 Hz).
[0877] 4-Bromo-1-(1-benzyloxycyclopropyl)-2-ethyl-benzene
(Intermediate 88)
[0878] Using General Procedure 2;
4-bromo-1-(1-benzyloxyvinyl)-2-ethyl-ben- zene (Intermediate 87,
330.0 mg, 1.04 mmols), Et.sub.2Zn (257.0 mg, 2.08 mmols), and
CH.sub.2I.sub.2 (557.0 mg, 2.08 mmols) in 4 mL Et.sub.2O afforded
241.0 mg (70%) of the title compound as a colorless oil after
chromatography (2-5% EtOAc-hexanes).
[0879] .sup.1H NMR (CDCl.sub.3) .delta.: 7.43-7.15 (8H, m), 4.27
(2H, s), 3.00 (2H, q, J=7.6 Hz), 1.29-1.21 (5H, m), 0.90 (2H,
m).
[0880]
[4-(1-Benzyloxycyclopropyl)-3-ethyl-phenylethynyl]-trimethylsilane
(Intermediate 89)
[0881] Using General Procedure D;
4-bromo-1-(1-benzyloxycyclopropyl)-2-eth- yl-benzene (Intermediate
88, 220.0 mg, 0.66 mmol) in triethylamine (8 mL) was treated with
copper(I)iodide (14.0 mg, 0.07 mmol) and then sparged with argon
for 5 minutes. Trimethylsilylacetylene (0.70 g, 7.1 mmols) was then
added followed by dichlorobis-(triphenylphosphine)palladium(II)
(50.0 mg, 0.07 mmol). The resulting reaction mixture was heated to
70.degree. C. for 5d. The title compound was isolated by
chromatography (0-2% EtOAc-hexanes).
[0882] .sup.1H NMR (CDCl.sub.3) .delta.: 7.41-7.13 (8H, m), 4.24
(2H, s), 2.98 (2H, q, J=7.6 Hz), 1.25 (3H, t, J=7.6 Hz), 1.20 (2H,
m), 0.90 (2H, m), 0.26 (9H, s).
[0883] 4-Ethynyl-1-(1-benzyloxycyclopropyl)-2-ethyl-benzene
(Intermediate 90)
[0884] Using General Procedure E;
[4-(1-benzyloxycyclopropyl)-3-ethyl-phen-
ylethynyl]-trimethylsilane (Intermediate 89, 240 mg, 0.69 mmol) in
methanol (6 mL) was treated with potassium carbonate (10.0 mg, 0.72
mmol) and stirred overnight at ambient temperature. The crude
alkyne (190 mg, 99%) was used directly in the next reaction.
.sup.1H NMR (CDCl.sub.3) .delta.: 7.43-7.15 (8H, m), 4.27 (2H, s),
3.08 (1H, s), 3.01 (2H, q, J=7.6 Hz), 1.26 (3H, t, J=7.6 Hz), 1.22
(2H, m), 0.92 (2H, m).
[0885] Ethyl
4-[4-(1-benzyloxycyclopropyl)-3-ethyl-phenylethynyl]-benzoate
(Compound 91, General Formula 2)
[0886] Using General Procedure F;
1-ethynyl-4-(1-benzyloxycyclopropyl)-3-e- thyl-benzene
(Intermediate 90, 90.0 mg, 0.33 mmol) and ethyl-4-iodo benzoate
(Reagent A, 100.0 mg, 0.36 mmol) in triethylamine (5 mL) was
treated with copper(I)iodide (21.0 mg, 0.11 mmol) and sparged with
argon for 5 minutes. Dichlorobis(triphenylphosphine)palladium(II)
(77 mg, 0.11 mmol) was added and the reaction mixture was stirred
overnight at room temperature. Column chromatography (2-4%
EtOAc-hexanes) afforded 100.0 mg (72%) of the title compound.
[0887] .sup.1H NMR (CDCl.sub.3) .delta.: 8.03 (2H, d, J=7.9 Hz),
7.59 (2H, d, J=7.9 Hz), 7.49 (1H, s), 7.36-7.16 (7H, m), 4.38 (2H,
q, J=7.1 Hz), 4.28 (2H, s), 3.04 (2H, q, J=7.6 Hz), 1.40 (3H, t,
J=7.1 Hz), 1.29 (3H, t, J=7.6 Hz), 1.23 (2H, m), 0.94 (2H, m).
[0888] Methyl
{4-[4-(1-benzyloxycyclopropyl)-3-ethyl-phenylethynyl]-phenyl-
}-acetate (Compound 92, General Formula 2)
[0889] Using General Procedure F;
1-ethynyl-4-(1-benzyloxycyclopropyl)-3-e- thyl-benzene
(Intermediate 90, 107.0 mg, 0.39 mmol) and
methyl-(4-iodophenyl)-acetate (Reagent B, 110.0 mg, 0.39 mmol) in
triethylamine (5 mL) was treated with copper(I)iodide (25.0 mg,
0.13 mmol) and sparged with argon for 5 minutes.
Dichlorobis(triphenylphosphin- e)palladium(II) (91 mg, 0.13 mmol)
was added and the reaction mixture was stirred overnight at room
temperature. Column chromatography (2-4% EtOAc-hexanes) afforded
130.0 mg (79%) of the title compound as a pale-yellow oil.
[0890] .sup.1H NMR (CDCl.sub.3) .delta.: 7.49 (3H, m), 7.32-7.16
(9H, m), 4.28 (2H, s), 3.71 (3H, s), 3.64 (2H, s), 3.03 (2H, q,
J=7.6 Hz), 1.32-1.23 (5H, m), 0.94 (2H, m).
[0891] 4-[4-(1-Benzyloxycyclopropyl)-3-ethyl-phenylethynyl]-benzoic
acid (Compound 93, General Formula 2)
[0892] Using General Procedure I; a solution of ethyl
4-[4-(1-benzyloxycyclopropyl)-3-ethyl-phenylethynyl]-benzoate
(Compound 91, 100.0 mg, 0.24 mmol) in ethanol (3 mL) and
tetrahydrofuran (3 mL) was treated with NaOH (120.0 mg, 3.0 mmols,
3.0 mL of a 1N aqueous solution) and stirred overnight at room
temperature. Work-up and purification by HPLC (Partisil 1 0-pac,
10% H.sub.2O/CH.sub.3CN) afforded the title compound as a colorless
solid.
[0893] .sup.1H NMR (CDCl.sub.3) .delta.: 8.10 (2H, d, J=8.5 Hz),
7.64 (2H, d, J=8.5 Hz), 7.50 (1H, s), 7.35-7.16 (7H, m), 4.29 (2H,
s), 3.04 (2H, q, J=7.6 Hz), 1.30 (3H, t, J=7.6 Hz), 1.25 (2H, m),
0.95 (2H, m).
[0894]
{4-[4-(1-Benzyloxycyclopropyl)-3-ethyl-phenylethynyl]1-phenyl}-acet-
ic acid (Compound 94, General Formula 2)
[0895] Using General Procedure I; a solution of methyl
{4-[4-(1-benzyloxycyclopropyl)-3-ethyl-phenylethynyl]-phenyl}-acetate
(Compound 92, 130.0 mg, 0.31 mmol) in ethanol (3 mL) and
tetrahydrofuran (3 mL) was treated with NaOH (120.0 mg, 3.0 mmols,
3.0 mL of a 1N aqueous solution) and stirred overnight at room
temperature. Work-up and purification by HPLC (Partisil 10-pac, 10%
H.sub.2O/CH.sub.3CN) afforded the title compound.
[0896] .sup.1H NMR (CDCl.sub.3) .delta.: 7.49 (3H, m), 7.31-7.16
(9H, m), 4.28 (2H, s), 3.66 (2H, s), 3.02 (2H, q, J=7.6 Hz), 1.29
(3H, t, J=7.6 Hz), 1.23 (2H, m), 0.94 (2H, m).
[0897] Isopropyl 2-ethyl-4-bromobenzoate (Intermediate 91)
[0898] Using General Esterification Procedure A;
4-bromo-2-ethyl-benzoic acid (2.25 g, 9.9 mmols) was combined with
isopropyl alcohol to give the title compound as a colorless oil
after column chromatography (2% EtOAc-hexanes).
[0899] .sup.1H NMR (CDCl.sub.3) .delta.: 7.69 (1H, d, J=8.5 Hz),
7.41 (1H, s), 7.36 (1H, d, J=8.5 Hz), 5.23 (1H, septet, J=6.2 Hz),
2.95 (2H, q, J=7.6 Hz), 1.37 (6H, d, J=6.2 Hz), 1.23 (3H, t, J=7.6
Hz).
[0900] 4-Bromo-1-(I -isopropoxyvinyl)-2-ethyl-benzene (Intermediate
92)
[0901] Using General Procedure 1; isopropyl 2-ethyl-4-bromobenzoate
(Intermediate 91, 1.21 g, 4.46 mmols) and 8.9 mL of Tebbe's Reagent
(1.27 g, 4.46 mmols) afforded 570.0 mg (75%) of the title compound
after column chromatography (100% hexanes).
[0902] .sup.1H NMR (CDCl.sub.3) .delta.: 7.36 (1H, d, J=2.0 Hz),
7.28 (1H, dd, J=2.0, 8.0 Hz), 7.17(1H, d, J=8.0 Hz),4.39(1H,
septet, J=6.2 Hz), 4.31 (1H, d, J=2.1 Hz), 4.26 (1H, d, J=2.1 Hz),
2.73 (2H, q, J=7.6 Hz), 1.35 (6H, d, J=6.2 Hz), 1.24 (3H, t, J=7.6
Hz).
[0903] 4-Bromo-1-(1-isopropoxycyclopropyl)-2-ethyl-benzene
(Intermediate 93)
[0904] Using General Procedure 2;
4-bromo-1-(1-isopropoxyvinyl)-2-ethyl-be- nzene (Intermediate 92,
570.0 mg, 2.11 mmols), Et.sub.2Zn (521.0 mg, 4.22 mmols), and
CH.sub.2I.sub.2 (1.13 g, 4.22 mmols) in 7.0 mL Et.sub.2O afforded
500.0 mg (85%) of the title compound as a colorless oil after
chromatography (3% EtOAc-hexanes).
[0905] .sup.1H NMR (CDCl.sub.3) .delta.: 7.39 (1H, d, J=2.1 Hz),
7.25 (1H, dd, J=2.1, 8.1 Hz), 7.15(1H, d, J=8.1 Hz),3.59(1H,
septet, J=6.2 Hz),2.97(2H, q, J=7.6 Hz), 1.27 (3H, t, J=7.6 Hz),
1.11 (2H, m), 0.97 (6H, d, J=6.2 Hz), 0.83 (2H, m).
[0906]
[4-(1-Isopropoxycyclopropyl)-3-ethyl-phenylethynyl]-trimethylsilane
(Intermediate 94)
[0907] Using General Procedure D;
4-bromo-1-(1-isopropoxycyclopropyl)-2-et- hyl-benzene (Intermediate
93, 300.0 mg, 1.07 mmol) in triethylamine (8 mL) was treated with
copper(I)iodide (20.0 mg, 0.11 mmol) and then sparged with argon
for 5 minutes. Trimethylsilylacetylene (0.70 g, 7.1 mmols) was then
added followed by dichlorobis-(triphenylphosphine)palladium(II)
(75.0 mg, 0.11 mmol). The resulting reaction mixture was heated to
70.degree. C. for 5d. The title compound (320.0 mg, 99%) was
isolated by chromatography (0-2% EtOAc-hexanes) as an orange
oil.
[0908] .sup.1H NMR (CDCl.sub.3) .delta.: 7.37-7.21 (3H, m), 3.56
(1H, septet, J=6.2 Hz), 2.96 (2H, q, J=7.6 Hz), 1.27 (3H, t, J=7.6
Hz), 1.10 (2H, m), 0.94 (6H, d, J=6.2 Hz), 0.84 (2H, m), 0.25 (9H,
s).
[0909] 4-Ethynyl-1-(1-isopropoxycyclopropyl)-2-ethyl-benzene
(Intermediate 95)
[0910] Using General Procedure E;
[4-(1-isopropoxycyclopropyl)-.sup.3-ethy-
l-phenylethynyl]-trimethylsilane (Intermediate 94, 330.0 mg, 1.10
mmols) in methanol (10 mL) was treated with potassium carbonate
(150.0 mg, 1.10 mmol) and stirred overnight at ambient temperature.
The crude alkyne (238 mg, 95%) was used directly in the next
reaction.
[0911] .sup.1H NMR (CDCl.sub.3) .delta.: 7.40-7.22 (3H, m), 3.59
(1H, septet, J=6.2 Hz), 3.07 (1H, s), 2.97 (2H, q, J=7.6 Hz), 1.28
(3H, t, J=7.6 Hz), 1.12 (2H, m), 0.96 (6H, d, J=6.2 Hz), 0.85 (2H,
m).
[0912] Ethyl
4-[4-(1-isopropoxycyclopropyl)-3-ethyl-phenylethynyl]-benzoat- e
(Compound 95, General Formula 2)
[0913] Using General Procedure F;
4-ethynyl-1-(1-isopropoxycyclopropyl)-3-- ethyl-benzene
(Intermediate 95, 108.0 mg, 0.47 mmol) and ethyl-4-iodo benzoate
(Reagent A, 130.0 mg, 0.47 mmol) in triethylamine (5 mL) was
treated with copper(I)iodide (30.0 mg, 0.16 mmol) and sparged with
argon for 5 minutes. Dichlorobis(triphenylphosphine)-palladium(II)
(110 mg, 0.16 mmol) was added and the reaction mixture was stirred
overnight at room temperature. Column chromatography (2-4%
EtOAc-hexanes) afforded 125.0 mg (71%) of the title compound as an
oil.
[0914] .sup.1H NMR (CDCl.sub.3) .delta.: 8.02 (2H, d, J=8.2 Hz),
7.59 (2H, d, J=8.2 Hz), 7.46 (1H, s), 7.33-7.26 (2H, m), 4.39 (2H,
q, J=7.1 Hz), 3.62 (1H, septet, J=6.2 Hz), 3.01 (2H, q, J=7.6 Hz),
1.41 (3H, t, J=7.1 Hz), 1.31 (3H, t, J=7.1 Hz), 1.14 (2H, m), 0.97
(6H, d, J=6.2 Hz), 0.88 (2H, m).
[0915] Methyl
{4-[4-(1-isopropoxycyclopropyl)-3-ethyl-phenylethynyl]-pheny- l
}-acetate (Compound 96, General Formula 2)
[0916] Using General Procedure F;
1-ethynyl-4-(1-isopropoxycyclopropyl)-3-- ethyl-benzene
(Intermediate 95, 130.0 mg, 0.57 mmol) and
methyl-(4-iodophenyl)-acetate (Reagent B, 157.0 mg, 0.57 mmol) in
triethylamine (5 mL) was treated with copper(I)iodide (36.0 mg,
0.19 mmol) and sparged with argon for 5 minutes.
Dichlorobis(triphenylphosphin- e)palladium(II) (133 mg, 0.19 mmol)
was added and the reaction mixture was stirred overnight at room
temperature. Column chromatography (2-5% EtOAc-hexanes) afforded
150.0 mg (70%) of the title compound as an orange oil.
[0917] .sup.1H NMR (CDCl.sub.3) .delta.: 7.50-7.44 (3H, m), 7.27
(4H, m), 3.70 (3H, s), 3.64 (2H, s), 3.62 (1H, septet, J=6.2 Hz),
3.00 (2H, q, J=7.6 Hz), 1.30 (3H, t, J=7.6 Hz), 1.13 (2H, m), 0.97
(6H, d, J=6.2 Hz), 0.87 (2H, m).
[0918]
4-[4-(1-Isopropoxycyclopropyl)-3-ethyl-phenylethynyl]-benzoic acid
(Compound 97, General Formula 2)
[0919] Using General Procedure I; a solution of ethyl
4-[4-(1-isopropoxycyclopropyl)-3-ethyl-phenylethynyl]-benzoate
(Compound 95, 110.0 mg, 0.29 mmol) in ethanol (3 mL) and
tetrahydrofuran (3 mL) was treated with NaOH (120.0 mg, 3.0 mmols,
3.0 mL of a 1N aqueous solution) and stirred overnight at room
temperature. Work-up and isolation by HPLC (partisil 10-pac, 10%
H.sub.2O/CH.sub.3CN) afforded the title compound as a colorless
solid.
[0920] .sup.1H NMR (d.sub.6-acetone) .delta.: 8.06 (2H, d, J=8.2
Hz), 7.67 (2H, d, J=8.2 Hz), 7.49 (1H, s), 7.40-7.34 (2H, m), 3.61
(1H, septet, J=6.2 Hz), 3.01 (2H, q, J=7.6 Hz), 1.29 (3H, t, J=7.6
Hz), 1.08 (2H, m), 0.93 (6H, d, J=6.2 Hz), 0.88 (2H, m).
[0921]
{4-[4-(1-Isopropoxycyclopropyl)-3-ethyl-phenylethynyl]-phenyl}-acet-
ic acid (Compound 98, General Formula 2)
[0922] Using General Procedure I; a solution of methyl
{4-[4-(1-isopropoxycyclopropyl)-3-ethyl-phenylethynyl]-phenyl
}-acetate (Compound 96, 156.0 mg, 0.41 mmol) in ethanol (3 mL) and
tetrahydrofuran (3 mL) was treated with NaOH (120.0 mg, 3.0 mmols,
3.0 mL of a 1N aqueous solution) and stirred overnight at room
temperature. Work-up and isolation by HPLC (partisil 10-pac, 10%
H.sub.2O/CH.sub.3CN) afforded 85.0 mg (57%) of the title
compound.
[0923] .sup.1H NMR (CDCl.sub.3) .delta.: 7.54-7.48 (3H, m),
7.34-7.27 (4H, m), 3.68 (2H, s), 3.66 (1H, septet, J=6.2 Hz), 3.03
(2H, q, J=7.6 Hz), 1.33 (2H, t, J=7.6 Hz), 1.17 (2H, m), 1.01 (6H,
d, J=6.2 Hz), 0.90 (2H, m).
[0924] (4-Bromo-3-isopropyl-phenoxy)-triisopropyl-silane
(Intermediate 96)
[0925] To a solution of 4-bromo-3-isopropylphenol (880.0 mg, 4.09
mmols) and imidazole (417.0 mg, 6.13 mmols) in 10 mL DMF was added
chloro-triisopropylsilane (946.0 mg, 4.90 mmols). After stirring
overnight at room temperature the solution was diluted with
H.sub.2O and extracted with EtOAc. The combined organic layers were
washed with H.sub.2O and saturated aqueous NaCl before being dried
(MgSO.sub.4) and concentrated under reduced pressure. The title
compound, 1.30 g (92%), was isolated by column chromatography (1-2%
EtOAc-hexanes) as a colorless oil.
[0926] .sup.1H NMR (CDCl.sub.3) .delta.: 7.34 (1H, d, J=8.5 Hz),
6.81 (1H, d, J=2.9 Hz), 6.59 (1H, dd, J=2.9, 8.5 Hz), 3.31 (1H,
septet, J=7.0 Hz), 1.33-1.21 (3H, m), 1.24 (6H, d, J=7.0 Hz), 1.13
(18H, d, J=7.0 Hz).
[0927] Ethyl 2-isopropyl-4-triisopropylsilanyloxy-benzoate
(Intermediate 97) To a solution of
(4-bromo-3-isopropyl-phenoxy)-triisopropyl-silane (Intermediate 96,
1.3 g, 3.8 mmols) in 15 mL Et.sub.2O cooled to -78.degree. C. was
added 4.9 mL of tert-butyllithium in pentane (532.0 mg, 8.3 mmols;
1.7 M). After stirring for 30 minutes ethyl chloroformate (832.0
mg, 7.8 mmols) was added. The resulting solution was warmed to room
temperature and quenched by the addition of saturated aqueous
NH.sub.4Cl. The mixture was extracted with EtOAc and the combined
organic layers dried (MgSO.sub.4) concentrated under reduced
pressure and the residue chromatographed (4% EtOAc-hexanes) to give
1.09 g (85%) of the title compound as a colorless oil.
[0928] .sup.1H NMR (CDCl.sub.3) .delta.: 7.72 (1H, d, J=8.5 Hz),
6.87 (1H, d, J=2.3 Hz), 6.69 (1H, dd, J=2.3, 8.5 Hz), 3.88 (1H,
septet; J=7.1 Hz), 4.30 (2H, q, J=7.1 Hz), 1.36 (3H, t, J=7.1 Hz),
1.31-1.17 (9H, m), 1.09 (18H).
[0929] [4-(1-Ethoxyvinyl)-3-isopropyl-phenoxy]-triisopropyl-silane
(Intermediate 98)
[0930] Using General Procedure 1; ethyl
2-isopropyl-4-triisopropylsilanylo- xy-benzoate (Intermediate 97,
450.0 mg, 1.34 mmols) and 2.0 mL of Tebbe's Reagent (398.0 mg, 1.40
mmols) afforded the title compound after column chromatography
(100% hexanes).
[0931] .sup.1H NMR (CDCl.sub.3) .delta.: 7.11 (1H, d, J=8.2 Hz),
6.78 (1H, d, J=2.3 Hz), 6.63 (1H, dd, J=2.3, 8.2 Hz),4.23 (1H, d,
J=1.7 Hz),4.10(1H, d, J=1.7 Hz), 3.86 (2H, q, J=7.0 Hz), 3.16 (1H,
septet, J=7.0 Hz), 1.35 (3H, t, J=7.1 Hz), 1.28-1.19 (3H, m), 1.19
(6H, d, J=7.0 Hz), 1.11 (18H).
[0932]
[4-(1-Ethoxycyclopropyl)-3-isopropyl-phenoxy]-triisopropyl-silane
(Intermediate 99)
[0933] Using General Procedure 2;
[4-(1-ethoxyvinyl)-3-isopropyl-phenoxy]-- triisopropyl-silane
(Intermediate 98, 300.0 mg, 0.83 mmols), Et.sub.2Zn (325.0 mg, 2.63
mmols), and CH.sub.2I.sub.2 (704.0 mg, 2.63 mmols) in 5.0 mL
Et.sub.2O afforded 270.0 mg (86%) of the title compound as a
colorless oil after chromatography (0.5-2.5% EtOAc-hexanes).
[0934] .sup.1H NMR (CDCl.sub.3) .delta.: 7.06 (1H, d; J=8.2 Hz),
6.81 (1H, d, J=2.6 Hz), 6.59 (1H, dd, J=2.6, 8.2 Hz), 3.76 (1H,
septet, J=7.0 Hz), 3.25 (2H, q, J=7.0 Hz), 1.30-1.20 (3H, m), 1.19
(6H, d, J=7.0 Hz), 1.15 (2H, m), 1.10 (18H), 1.02 (2H, t, J=7.0
Hz), 0.82 (2H, m).
[0935] 4-(1-Ethoxycyclopropyl)-3-isopropyl-phenol (Intermediate
100)
[0936] To a solution of
[4-(1-ethoxycyclopropyl)-3-isopropyl-phenoxy]-trii- sopropyl-silane
(Intermediate 99, 360.0 mg, 0.96 mmol) in 3 mL THF at 0.degree. C.
was added tetrabutylammonium fluoride (625.0 mg, 2.39 mmols, 2.4 mL
of a 1 M solution in THF). The solution was stirred at 0.degree. C.
for 30 minutes and then quenched by the addition of H.sub.2O. The
mixture was extracted with EtOAc and the combined organic layers
were washed with H.sub.2O and saturated aqueous NaCl before being
dried (MgSO.sub.4) and concentrated under reduced pressure. The
title compound (180 mg, 86%) was isolated from the residue by
column chromatography (4-10% EtOAc-hexanes) as a colorless
solid.
[0937] .sup.1H NMR (CDCl.sub.3) .delta.: 7.13 (1H, d, J=8.2 Hz),
6.79 (1H, d, J=2.6 H), 6.57 (1H, dd, J=2.6, 8.2 Hz),5.48(1H,
s),3.79(1H, septet, J=7.0 Hz),3.32(2H, q, J=7.0 Hz), 1.21 (6H, d,
J=7.0 Hz), 1.12 (2H, m), 1.05 (3H, t, J=7.0 Hz), 0.84 (2H, m).
[0938] 4-(1-Ethoxycyclopropyl)-3-isopropyl-phenyl
1,1,1-trifluoromethansul- fonate (Intermediate 101)
[0939] A solution of 4-(1-ethoxycyclopropyl)-3-isopropyl-phenol
(Intermediate 100, 172.0 mg, 0.78 mmol) in 5 mL of CH.sub.2Cl.sub.2
was cooled to 0.degree. C. and to it was added
2-[N,N-bis(trifluoromethylsulf- onyl)amino]-5-chloropyridine (321.0
mg, 0.82 mmol) and triethylamine (240.0 mg, 2.4 mmols). The
resulting solution was warmed to room temperature and stirred
overnight. The reaction was quenched by the addition of H.sub.2O
and the mixture extracted with EtOAc and the combined organic
layers were washed with 10% aqueous HCl, saturated aqueous
NaHCO.sub.3, H.sub.2O, and saturated aqueous NaCl. The solution was
dried (MgSO.sub.4) and concentrated under reduced pressure. The
title compound was isolated by column chromatography (2-4%
EtOAc-hexanes) as a colorless oil, 240.0 mg, 87%.
[0940] .sup.1H NMR (CDCl.sub.3) .delta.: 7.31 (1H, d, J=8.6 Hz),
7.18 (1H, d, J=2.6 Hz), 7.00 (1H, dd, J=2.6, 8.6 Hz), 3.87 (1H,
septet, J=7.0 Hz), 2.38 (2H, q, J=7.0 Hz), 1.24 (6H, d, J=7.0 Hz),
1.15 (2H, m), 1.04 (3H, t, J=7.0 Hz), 0.86 (2H, m).
[0941]
[4-(1-Ethoxycyclopropyl)-3-isopropyl-phenylethynyl]-trimethylsilane
(Intermediate 102)
[0942] Using General Procedure D;
4-(1-ethoxycyclopropyl)-3-isopropyl-phen- yl
1,1,1-trifluoromethansulfonate (Intermediate 101, 240.0 mg, 0.68
mmol) in triethylamine (2 mL) and DMF (6 mL) was sparged with argon
for 5 minutes. Trimethylsilylacetylene (0.70 g, 7.1 mmols) was then
added followed by dichlorobis-(triphenylphosphine)palladium(II)
(38.0 mg, 0.05 mmol). The resulting reaction mixture was heated to
95.degree. C. for 5d. The title compound, 200.0 mg (99%), was
isolated by chromatography (0-2% EtOAc-hexanes) as an orange
oil.
[0943] .sup.1H NMR (CDCl.sub.3) .delta.: 7.43 (1H, d, J=1.7 Hz),
7.25 (1H, dd, J=1.7, 7.9 Hz), 7.16 (1H, d, J=7.9 Hz), 3.80 (1H,
septet, J=6.8 Hz), 3.26 (2H, q, J=7.0 Hz), 1.24 (6H, d, J=6.8 Hz),
1.24-1.10 (2H, m), 1.03 (3H, t, J=7.0 Hz), 0.87 (2H, s), 0.26 (9H,
s).
[0944] 1-(1-Ethoxycyclopropyl)-4-ethynyl-2-isopropylbenzene
(Intermediate 103)
[0945] Using General Procedure E;
[4-(1-ethoxycyclopropyl)-3-isopropyl-phe-
nylethynyl]-trimethylsilane (Intermediate 102, 210.0 mg, 0.70 mmol)
in methanol (10 mL) was treated with potassium carbonate (100.0 mg,
0.72 mmol) and stirred overnight at ambient temperature. The crude
alkyne was used directly in the next reaction.
[0946] .sup.1H NMR (CDCl.sub.3) .delta.: 7.47 (1H, d, J=1.7 Hz),
7.23 (1H, dd, J=1.7, 7.6 Hz), 7.19 (1H, d, J=7.6 Hz), 3.80 (1H,
septet, J=7.0 Hz), 3.27 (1H, q, J=7.0 Hz), 3.07 (1H, s), 1.23 (6H,
d, J=7.0 Hz), 1.13 (2H, m), 1.03 (3H, t, J=7.0 Hz), 0.85 (2H,
m).
[0947] Ethyl
4-[4-(1-ethoxycyclopropyl)-3-isopropyl-phenylethynyl]-benzoat- e
(Compound 99, General Formula 2)
[0948] Using General Procedure F; I
-(1-ethoxycyclopropyl)-4-ethynyl-2-iso- propylbenzene (Intermediate
103, 50.0 mg, 0.22 mmol) and ethyl-4-iodo benzoate (Reagent A, 60.0
mg, 0.22 mmol) in triethylamine (5 mL) was treated with
copper(I)iodide (14.0 mg, 0.07 mmol) and sparged with argon for 5
minutes. Dichlorobis(triphenylphosphine)-palladium(II) (51 mg, 0.07
mmol) was added and the reaction mixture was stirred overnight at
room temperature. Column chromatography (1-2% EtOAc-hexanes)
afforded 28.0 mg (34%) of the title compound.
[0949] .sup.1H NMR (CDCl.sub.3) .delta.: 8.01 (2H, d, J=8.2 Hz),
7.59 (2H, d, J=8.2 Hz), 7.51 (1H, d J=1.7 Hz), 7.28 (1H, dd, J=1.7,
7.9 Hz), 7.21 (1H, d, J=7.9 Hz), 4.38 (2H, q, J=7.1 Hz), 3.83 (1H,
septet, J=6.7 Hz), 3.29 (2H, q, J=7.0 Hz), 1.40 (3H, t, J=7.1 Hz),
1.26 (6H, d, J=6.7 Hz), 1.14 (2H, m), 1.04 (3H, t, J=7.0 Hz), 0.87
(2H, m).
[0950] Methyl
{4-[4-(1-ethoxycyclopropyl)-3-isopropyl-phenylethynyl]-pheny-
l}-acetate (Compound 100, General Formula 2)
[0951] Using General Procedure F;
1-(1-ethoxycyclopropyl)-4-ethynyl-2-isop- ropylbenzene
(Intermediate 103, 120.0 mg, 0.52 mmol) and
methyl-(4-iodophenyl)-acetate (Reagent B, 150.0 mg, 0.52 mmol) in
triethylamine (8 mL) was treated with copper(I)iodide (32.0 mg,
0.17 mmol) and sparged with argon for 5 minutes.
Dichlorobis(triphenylphosphin- e)palladium(II) (121 mg, 0.17 mmol)
was added and the reaction mixture was stirred overnight at room
temperature. Column chromatography (2-5% EtOAc-hexanes) afforded
140.0 mg (71%) of the title compound as a pale-yellow oil.
[0952] .sup.1H NMR (CDCl.sub.3) .delta.: 7.53 (3H, m), 7.31-7.23
(4H, m), 3.86 (1H, septet, J=6.7 Hz), 3.73 (3H, s), 3.67 (2H, s),
3.33 (2H, q, J=7.0 Hz), 1.30 (6H, d, J=6.7 Hz), 1.15 (2H, m), 1.08
(3H, t, J=7.0 Hz), 0.90 (2H, m).
[0953]
4-[4-(1-Ethoxycyclopropyl)-3-isopropyl-phenylethynyl]-benzoic acid
(Compound 101, General Formula 2)
[0954] Using General Procedure I; A solution of ethyl
4-[4-(1-ethoxycyclopropyl)-3-isopropyl-phenylethynyl]-benzoate
(Compound 99, 28.0 mg, 0.07 mmol) in ethanol (2 mL) and
tetrahydrofuran (2 mL) was treated with NaOH (80.0 mg, 2.0 mmols,
2.0 mL of a 1N aqueous solution) and stirred overnight at room
temperature. Work-up afforded 24 mg (92%) the title compound as a
pale-yellow solid.
[0955] .sup.1H NMR (d.sub.6-acetone) .delta.: 8.06 (2H, d, J=8.2
Hz), 7.66 (2H, d, J=8.2 Hz), 7.58 (1H, s), 7.33 (2H, m), 3.87 (1H,
m), 2.27 (2H, q, J=7.0 Hz), 1.26 (6H, d, J=6.7 Hz), 1.09 (2H, m),
0.99 (3H, t, J=7.0 Hz), 0.88 (2H, m).
[0956]
{4-[4-(1-Ethoxycyclopropyl)-3-isopropyl-phenylethynyl]-phenyl}-acet-
ic acid (Compound 102, General Formula 2)
[0957] Using General Procedure I; a solution of methyl
{4-[4-(1-ethoxycyclopropyl)-3-isopropyl-phenylethynyl]-phenyl}-acetate
(Compound 100, 130.0 mg, 0.35 mmol) in ethanol (5 mL) and
tetrahydrofuran (5 mL) was treated with NaOH (120.0 mg, 3.0 mmols,
3.0 mL of a 1N aqueous solution) and stirred at 50.degree. C. for 4
h. Work-up and isolation by HPLC (Partisil 10-pac, 10%
H.sub.2O/CH.sub.3CN) afforded 88.0 mg (70%) of the title
compound.
[0958] .sup.1H NMR (CDCl.sub.3) .delta.: 7.50 (3H, m), 7.28-7.19
(4H, m), 3.82 (1H, m), 3.65 (2H, s), 3.29 (2H, q, J=7.0 Hz), 1.25
(6H, d, J=6.7 Hz), 1.14 (2H, m), 1.04 (3H, t, J=7.0 Hz), 0.86 (2H,
m).
[0959] 4-Bromo-3-tert-butylphenol (Intermediate 104)
[0960] To a mixture of 3-tert-butyl-methoxy benzene (1.00 g, 6.09
mmols) in CCl.sub.4 (20 mL), molecular sieves, and silica gel was
added N-bromosuccinimide (1.19 g, 6.70 mmols). This mixture was
stirred at 55.degree. C. for 48 h. The resulting mixture was cooled
to room temperature, filtered to remove the solids, and the
filtrate diluted with EtOAc. This solution was washed with
H.sub.2O, 10% aqueous HCl, H.sub.2O, saturated aqueous NaHCO.sub.3
and saturated aqueous NaCl before being dried (MgSO.sub.4) and
concentrated under reduced pressure. Column chromatography (2.5%
EtOAc-hexanes) afforded 1.15 g (78%) of a 3 to 1 mixture of
1-bromo-2-tert-butyl methoxy benzene and
1-bromo-2-methoxy-4-tert-butyl benzene as a colorless oil.
[0961] A solution of the isomeric methoxy compounds in 10 mL of
CH.sub.2Cl.sub.2 was cooled to 0.degree. C. and treated with a
solution (18.5 mL) of BBr.sub.3 in CH.sub.2Cl.sub.2 (4.63 g, 18.5
mmols). After 10 minutes the solution was warmed to room
temperature, stirred for 1 h, and then quenched with H.sub.2O. The
mixture was extracted with EtOAc and the combined organic layers
washed with saturated aqueous NaCl, dried (MgSO.sub.4), and
concentrated under reduced pressure. The title compound was
isolated, 1.17 g (59%), by column chromatography (2.5-5%
EtOAc-hexanes).
[0962] .sup.1H NMR (CDCl.sub.3).delta.: 7.39 (1H, d, J=8.5 Hz),
6.96 (1H, d, J=2.9 Hz), 6.54 (1H, dd, J=2.9, 8.5 Hz), 1.46 (9H,
s).
[0963] (4-Bromo-3-tert-butyl-phenoxy)-triisopropyl-silane
(Intermediate 105)
[0964] To a solution of 4-bromo-3-tert-butylphenol (Intermediate
104, 1.17 g, 5.10 mmols) and imidazole (520.0 mg, 7.65 mmols) in 10
mL DMF was added chloro-triisopropylsilane (1.18 g, 6.10 mmols).
After stirring overnight at room temperature the solution was
diluted wirth H.sub.2O and extracted with EtOAc. The combined
organic layers were washed with H.sub.2O and saturated aqueous NaCl
before being dried (MgSO.sub.4) and concentrated under reduced
pressure. The title compound, 1.80 g (92%), was isolated by column
chromatography (0-1.5% EtOAc-hexanes) as a colorless oil.
[0965] .sup.1H NMR (CDCl.sub.3) .delta.: 7.38 (1H, d, J=8.0 Hz),
6.97 (1H, d, J=2.9 Hz), 6.56 (1H, dd, J=2.9, 8.5 Hz), 1.47 (9H, s),
1.29-1.24 (3H, m), 1.09 (18H, d, J=6.7 Hz).
[0966] Ethyl 2-tert-butyl-4-triisopropylsilanyloxy-benzoate
(Intermediate 106)
[0967] To a solution of
(4-bromo-3-tert-butyl-phenoxy)-triisopropyl-silane (Intermediate
105, 1.00 g, 2.60 mmols) in 15 mL Et.sub.2O cooled to -78.degree.
C. was added 3.6 mL of tert-butyllithium, 1.7 M in pentane (395.0
mg, 6.2 mmols). After stirring for 30 minutes ethyl chloroformate
(607.6 mg, 5.6 mmols) was added. The resulting solution was warmed
to room temperature and quenched by the addition of saturated
aqueous NH.sub.4Cl. The mixture was extracted with EtOAc and the
combined organic layers dried (MgSO.sub.4) concentrated under
reduced pressure The residue was chromatographed (2-5%
EtOAc-hexanes) to give 1.23 g (88%) of the title compound as a
colorless oil.
[0968] .sup.1H NMR (CDCl.sub.3) .delta.: 7.24 (1H, d, J=8.2, Hz),
6.97 (1H, d, J=2.6 Hz), 6.69 (1H, dd, J=2.6, 8.2 Hz), 4.33 (2H, q,
J=7.1 Hz), 1.39 (9H, s), 1.37 (3H, t, J=7.1 Hz), 1.29-1.21 (3H, m),
1.10 (18H, d, J=6.7 Hz).
[0969] [4-(1-Ethoxyvinyl)-3-tert-butyl-phenoxy]-triisopropyl-silane
(Intermediate 107)
[0970] Using General Procedure 1; ethyl
2-tert-butyl-4-triisopropylsilanyl- oxy-benzoate (Intermediate 106,
1.30 g, 3.44 mmols) and 7.2 mL of Tebbe's Reagent (1.03 g, 3.61
mmols) were reacted. The reaction required 7 days at room
temperature to go to completion. The standard work-up afforded 1.29
g (78%) of the title compound after column chromatography (1-2%
EtOAc-hexanes).
[0971] .sup.1H NMR (CDCl.sub.3) .delta.: 7.05 (1H, d, J=8.2 Hz),
6.94 (1H, d, J=2.6 Hz), 6.63 (1H, dd, J=2.6, 8.2 Hz), 4.20 (1H, d,
J=1.7 Hz), 4.08 (1H, d, J=1.7 Hz), 3.83 (2H, q, J=7.1 Hz), 1.37
(9H, s), 1.36 (3H, t, J=7.1 Hz), 1.27-1.20 (3H, m), 1.10 (18H, d,
J=6.7 Hz).
[0972]
[4-(1-Ethoxycyclopropyl)-3-tert-butyl-phenoxy]-triisopropyl-silane
(Intermediate 108)
[0973] Using General Procedure 2;
[4-(1-ethoxyvinyl)-3-tert-butyl-phenoxy]- -triisopropyl-silane
(Intermediate 107, 320.0 mg, 0.85 mmols), Et.sub.2Zn (325.0 mg,
2.63 mmols), and CH.sub.2I.sub.2 (704.0 mg, 2.63 mmols) in 5.0 mL
Et.sub.2O afforded 257.0 mg (66%) of the title compound as a
colorless oil after chromatography (1-2.5% EtOAc-hexanes).
[0974] .sup.1H NMR (CDCl.sub.3) .delta.: 7.24 (1H, d, J=8.5 Hz),
7.06 (1H, d, J=2.6 Hz), 6.60 (1H, dd, J=2.6, 8.5 Hz), 3.24 (2H, q,
J=7.1 Hz), 1.50 (9H, s), 1.29-1.21 (3H, m), 1.11 (18H, d, J=6.7
Hz), 1.04 (3H, t, J=7.1 Hz).
[0975] 4-(1-Ethoxycyclopropyl)-3-tert-butyl-phenol (Intermediate
109)
[0976] To a solution of
[4-(1-ethoxycyclopropyl)-3-tert-butyl-phenoxy]-tri-
isopropyl-silane (Intermediate 108, 600.0 mg, 1.54 mmol) in 3 mL
THF at 0.degree. C. was added tetrabutylammonium fluoride (802.8.0
mg, 3.07 mmols; 3.1 mL of a 1 M solution in THF). The solution was
stirred at 0.degree. C. for 30 minutes and then quenched by the
addition of H.sub.2O. The mixture was extracted with EtOAc and the
combined organic layers were washed with H.sub.2O and saturated
aqueous NaCl before being dried (MgSO.sub.4) and concentrated under
reduced pressure. The title compound (400 mg, 88%) was isolated
from the residue by column chromatography (4-10% EtOAc-hexanes) as
a colorless solid.
[0977] .sup.1H NMR (CDCl.sub.3) .delta.: 7.29 (1H, d, J=8.2 Hz),
7.01 (1H, d, J=2.6 Hz), 6.57 (1H, dd, J=2.6, 8.2 Hz), 3.29 (2H, q,
J=7.1 Hz), 1.59 (9H, s), 1.08-1.04 (7H, m).
[0978] 4-(1-Ethoxycyclopropyl)-3-tert-butyl-phenyl
1,1,1-trifluoromethansu- lfonate (Intermediate 110)
[0979] A solution of 4-(1-ethoxycyclopropyl)-3-tert-butyl-phenol
(Intermediate 109, 400.0 mg, 1.71 mmol) in 10 mL of
CH.sub.2Cl.sub.2 was cooled to 0.degree. C. and to it was added
2-[N,N-bis(trifluoromethylsulf- onyl)amino]-5-chloropyridine (705.0
mg, 1.79 mmol) and triethylamine (522.0 mg, 5.1 mmols). The
resulting solution was warmed to room temperature and stirred
overnight. The reaction was quenched by the addition of H.sub.2O
and the mixture extracted with EtOAc and the combined organic
layers were washed with 10% aqueous HCl, saturated aqueous
NaHCO.sub.3, H.sub.2O, and saturated aqueous NaCl. The solution was
dried (MgSO.sub.4) and concentrated under reduced pressure. The
title compound was isolated by column chromatography (2-4%
EtOAc-hexanes) as a colorless oil, 542.0 mg (87%). .sup.1H
NMR(CDCl.sub.3).delta.:7.48(1H, d, J=8.5 Hz),7.39(1H, d, J=2.6
Hz),7.01 (1H, dd, J=2.6, 8.5 Hz), 3.26 (2H, q, J=7.1 hz), 1.52 (9H,
s), 1.12 (2H, bs), 1.08-1.04 (5H, m).
[0980]
[4-(1-Ethoxycyclopropyl)-3-tert-butyl-phenylethynyl]-trimethylsilan-
e (Intermediate 111)
[0981] Using General Procedure D;
4-(1-ethoxycyclopropyl)3-tert-butyl phenyl
1,1,1-trifluoromethansulfonate (Intermediate 110, 260.0 mg, 0.71
mmol) in triethylamine (4 mL) and DMF (6 mL) was sparged with argon
for 5 minutes. Trimethylsilylacetylene (0.70 g, 7.1 mmols) was then
added followed by dichlorobis-(triphenylphosphine)palladium(II)
(40.0 mg, 0.06 mmol). The resulting reaction mixture was heated to
95.degree. C. for 18 hours. The title compound, 215.0 mg (96%), was
isolated by chromatography (0-2% EtOAc-hexanes) as an orange
oil.
[0982] .sup.1H NMR (CDCl.sub.3) .delta.: 7.63 (1H, d, J=1.7 Hz),
7.32 (1H, d, J=7.9 Hz), 7.19 (1H, dd, J=1.7, 7.9 Hz), 3.24 (2H, q,
J=7.1 Hz), 1.51 (9H, s), 1.10 (2H, bs), 1.06-1.01 (5H, m), 0.25
(9H, s).
[0983] 1-(1-Ethoxycyclopropyl)-4-ethynyl-2-tert-butylbenzene
(Intermediate 112)
[0984] Using General Procedure E;
[4-(1-ethoxycyclopropyl)-3-tert-butyl-ph-
enylethynyl]-trimethylsilane (Intermediate 111, 215.0 mg, 0.69
mmol) in methanol (10 mL) was treated with potassium carbonate
(80.0 mg, 0.58 mmol) and stirred overnight at ambient temperature.
The crude alkyne, 169 mg, was used directly in the next
reaction.
[0985] .sup.1H NMR (CDCl.sub.3) .delta.: 7.68 (1H, d, J=1.8 Hz),
7.36 (1H, d, J=7.9 Hz), 7.23 (1H, dd, J=1.8, 7.9 Hz), 3.26 (2H, q,
J=7.1 Hz), 3.06 (1H, s), 1.51 (9H, s), 1.11 (2H, bs), 1.07-1.02
(5H, m).
[0986] Ethyl
4-[4-(1-ethoxycyclopropyl)-3-tert-butyl-phenylethynyl]-benzoa- te
(Compound 103, General Formula 2)
[0987] Using General Procedure F;
1-(1-ethoxycyclopropyl)-4-ethynyl-2-tert- -butylbenzene
(Intermediate 112, 70.0 mg, 0.30 mmol) and ethyl-4-iodo benzoate
(Reagent A, 85.0 mg, 0.30 mmol) in triethylamine (5 mL) was treated
with copper(I)iodide (19.0 mg, 0.01 mmol) and sparged with argon
for 5 minutes. Dichlorobis(triphenylphosphine)-palladium(II) (70
mg, 0.01 mmol) was added and the reaction mixture was stirred
overnight at room temperature. Column chromatography (1-2%
EtOAc-hexanes) afforded 70.0 mg (73%) of the title compound.
[0988] .sup.1H NMR (CDCl.sub.3) .delta.: 8.02 (2H, d, J=8.8 Hz),
7.72 (1H, d, J=1.7 Hz), 7.59 (2H, d, J=8.8 Hz), 7.40 (1H, d, J=7.9
Hz), 7.28 (1H, dd, J=1.7, 7.9 Hz), 4.39 (2H, q, J=7.1 Hz), 3.28
(2H, q, J=7.1 Hz), 1.55 (9H, s), 1.40 (3H, t, J=7.1 Hz), 1.12 (2H,
bs), 1.08-1.04 (5H, m).
[0989] Methyl
{4-[4-(1-ethoxycyclopropyl)-3-tert-butyl-phenylethynyl]-phen-
yl}-acetate (Compound 104, General Formula 2)
[0990] Using General Procedure F;
1-(1-ethoxycyclopropyl)-4-ethynyl-2-tert- -butylbenzene
(Intermediate 112, 95.0 mg, 0.39 mmol) and
methyl-(4-iodophenyl)-acetate (Reagent B, 108.0 mg, 0.39 mmol) in
triethylamine (8 mL) was treated with copper(I)iodide (25.0 mg,
0.13 mmol) and sparged with argon for 5 minutes.
Dichlorobis(triphenylphosphin- e)palladium(II) (91 mg, 0.13 mmol)
was added and the reaction mixture was stirred overnight at room
temperature. Column chromatography (2-5% EtOAc-hexanes) afforded
100.0 mg (72%) of the title compound.
[0991] .sup.1H NMR (CDCl.sub.3).delta.: 7.70 (1H, d, J=1.5 Hz),
7.50 (2H, d, J=7.9 Hz), 7.38 (1H, d, J=7.9 Hz), 7.27 (3H, m), 3.70
(3H, s), 3.64 (2H, s), 3.28 (2H, q, J=7.1 Hz), 1.54 (9H, s), 1.12
(2H, bs), 1.08-1.03 (5H, m).
[0992]
4-[4-(1-Ethoxycyclopropyl)-3-tert-butyl-phenylethynyl]-benzoic acid
(Compound 105, General Formula 2)
[0993] Using General Procedure I; a solution of ethyl
4-[4-(1-ethoxycyclopropyl)-3-tert-butyl-phenylethynyl]-benzoate
(Compound 103, 70.0 mg, 0.18 mmol) in ethanol (3 mL) and
tetrahydrofuran (3 mL) was treated with NaOH (240.0 mg, 6.0 mmols,
3.0 mL of a 2N aqueous solution) and stirred overnight at room
temperature. Work-up afforded 40 mg (62%) the title compound as a
pale-yellow solid.
[0994] .sup.1H NMR (d.sub.6-acetone) .delta.: 8.06 (2H, d, J=8.7
Hz), 7.76 (1H, d, J=1.8 Hz), 7.67 (2H, d, J=8.7 Hz), 7.50 (1H, d,
J=7.9 Hz), 7.33 (1H, dd, J=1.8, 7.9 Hz), 3.28 (2H, q, J=7.3 Hz),
1.54 (9H, s), 1.13 (2H, bs), 1.10 (2H, m), 1.02 (3H, t, J=7.3
Hz).
[0995] {4-[4-(I
-Ethoxycyclopropyl)-3-tert-butyl-phenylethynyl]-phenyl }-acetic
acid (Compound 106, General Formula 2)
[0996] Using General Procedure I; a solution of methyl
{4-[4-(1-ethoxycyclopropyl)-3-tert-butyl-phenylethynyl]-phenyl}-acetate
(Compound
[0997] 104, 100.0 mg, 0.26 mmol) in ethanol (4 mL) and
tetrahydrofuran (4 mL) was treated with NaOH (240.0 mg, 6.0 mmols,
3.0 mL of a 2N aqueous solution) and stirred at 50.degree. C. for 4
h. Work-up and isolation by HPLC (Partisil 10-pac, 10%
H.sub.2O/CH.sub.3CN) afforded 70.0 mg (73%) of the title
compound.
[0998] .sup.1H NMR (CDCl.sub.3) .delta.: 7.73 (1H, d, J=1.3 Hz),
7.53 (2H, d, J=7.9 Hz), 7.41 (1H, d, J=7.9 Hz), 7.28 (3H, m), 3.69
(2H, s), 3.31 (2H, q, J=7.1 Hz), 1.56 (9H, s), 1.15 (2H, bs),
1.11-1.05 (5H, m).
[0999] 1-(4-Bromophenyl)-cyclopropanecarbonitrile (Intermediate
113)
[1000] To a 50% aqueous NaOH solution (40.0 g, wt/wt) was added
benzyl triethylammonium chloride (1.0 g, 4.4 mmols),
4-bromobenzonitrile (19.6 g, 0.10 mol), and 1,2-dibromoethane (56.4
g, 0.30 mol). The mixture was stirred overnight at room temperature
and then diluted with 100 mL of H.sub.2O. This mixture was
extracted with EtOAc and the combined extracts were washed with
saturated aqueous NaHS.sub.2O.sub.3, H.sub.2O, and saturated
aqueous NaCl before being dried (MgSO.sub.4) and concentrated under
reduced pressure. Bulb-to-bulb distillation afforded 18.8 g (85%)
of the title compound as a colorless solid.
[1001] .sup.1H NMR (CDCl.sub.3) .delta.: 7.48 (2H, d, J=8.6 Hz),
7.17 (2H, d, J=8.6 Hz), 1.75 (2H, dd, J=5.2, 7.6 Hz), 1.39 (2H, dd,
J=5.2, 7.6 Hz).
[1002] 1-(4-Bromophenyl)-cyclopropanecarboxylic acid (Intermediate
114)
[1003] To a solution of KOH (6.06 g, 0.11 mol) in 10 mL of H.sub.2O
was added 40 mL of ethylene glycol and
1-(4-bromophenyl)-cyclopropanecarbonit- rile (Intermediate 113,
10.0 g, 0.45 mol). This solution was heated to 135-140.degree. C.
for 4 h, cooled to room temperature, and then poured into a mixture
of 100 mL ice and 10% aqueous HCl. The resulting mixture was
allowed to stand overnight at 5.degree. C., the solid was collected
by filtration and washed with H.sub.2O. The colorless solid was
dried under reduced pressure to give 10.6 g (97%) of the title
compound.
[1004] .sup.1H NMR (CDCl.sub.3) .delta.: 7.43 (2H, d, J=8.5 Hz),
7.21 (2H, d, J=8.5 Hz), 1.68 (2H, dd, J=4.0, 7.1 Hz), 1.24 (2H, dd,
J=4.0, 7.1 Hz).
[1005] Tert-butyl [1-(4-bromophenyl)-cyclopropyl]-carbamate
(Intermediate 115)
[1006] A solution of 1-(4-bromophenyl)-cyclopropanecarboxylic acid
(Intermediate 114, 2.32 g, 9.62 mmols), diphenylphosphoryl azide
(2.65 g, 9.62 mmols), triethylamine (973.0 mg, 9.62 mmols) in 40 mL
tert-BuOH (distilled from Na.degree.) was heated to reflux for 17
h. The solution was concentrated under reduced pressure and the
residue dissolved in EtOAc and washed with 5% aqueous HCl,
H.sub.2O, saturated aqueous NaHCO.sub.3, and saturated aqueous NaCl
before being dried over MgSO.sub.4. Concentration of the dry
solution under reduced pressure and column chromatography (5-10%
EtOAc-hexanes) afforded 2.01 g (67%) of the title compound as a
colorless solid.
[1007] .sup.1H NMR (CDCl.sub.3) .delta.: 7.39 (2H, d, J=8.3 Hz),
7.08 (2H, d, J=8.3 Hz), 5.35 (1H, bs), 1.43 (9H, s), 1.26 (2H, m),
1.17 (2H, m).
[1008] 1-(4-Bromophenyl)-cyclopropylamine (Intermediate 116)
[1009] To a solution of tert-butyl
[1-(4-bromophenyl)-cyclopropyl]-carbama- te (Intermediate 115, 1.08
g, 3.40 mmols) in 20 mL MeOH and 20 mL THF was added 20 mL of 3M
aqueous HCl. The solution was warmed to 35.degree. C. for 3 hours
and then stirred for 17 h at 25.degree. C. The reaction was
quenched by adjusting the pH of the solution to 12 with 3M aqueous
NaOH. The mixture was extracted with Et.sub.2O and the combined
organic layers were washed with H.sub.2O and saturated aqueous NaCl
before being dried (MgSO.sub.4) and concentrated under reduced
pressure. The title compound 613 mg (85%) was used without further
purification.
[1010] .sup.1H NMR (CDCl.sub.3) .delta.: 7.43 (2H, d, J=8.3 Hz),
7.17 (2H, d, J=8.3 Hz), 1.89 (2H, bs), 1.07 (2H, m), 0.95 (2H,
m).
[1011] N-[1-(4-bromophenyl)-cyclopropyl]-propionamide (Intermediate
117)
[1012] To a solution of 1-(4-bromophenyl)-cyclopropylamine
(Intermediate 116, 84 mg, 0.4 mmol) in 4 mL CH.sub.2Cl.sub.2 at
room temperature was added propionyl chloride (43.0 mg, 0.47 mmol)
and pyridine (56.0 mg, 0.71 mmol). After stirring 17 hours at room
temperature the reaction was quenched by the addition of H.sub.2O
and extracted with EtOAc. The combined extracts were washed with
10% aqueous HCl, saturated aqueous NaHCO.sub.3, and saturated
aqueous NaCl before being dried (MgSO.sub.4) and concentrated under
reduced pressure. The title compound 85.0 mg (67%), was isolated by
column chromatography (20-50% EtOAc-hexanes) as a colorless
solid.
[1013] .sup.1H NMR (CDCl.sub.3) .delta.: 7.48 (2H, d, J=8.5 Hz),
7.09 (2H, d, J=8.5 Hz), 6.40 (1H, s), 2.19 (2H, q, J=7.2 Hz),
1.18-1.24 (4H, m), 1.12 (3H, t, J=7.2 Hz).
[1-(4-Bromophenyl)-cyclopropyl]-propylamine (Intermediate 118)
[1014] To a solution of N-[
1-(4-bromophenyl)-cyclopropyl]-propionamide (Intermediate 117, 85.0
mg, 0.32 mmol) in THF (5 mL) at 0.degree. C. was added
BH.sub.3--Me.sub.2S (48.0 mg, 0.63 mmol; 0.31 mL of a 2M solution
in THF). The solution was heated to 55.degree. C. for 17 hours,
cooled to room temperature, saturated aqueous NaHCO.sub.3 was added
and the resulting mixture was stirred for 2 hours. This mixture was
extracted with EtOAc and the combined organic layers were washed
with H.sub.2O and saturated aqueous NaCl before being dried
(MgSO.sub.4) and concentrated under reduced pressure. The title
compound was isolated by column chromatography (10-30%
EtOAc-hexanes).
[1015] .sup.1H NMR (CDCl.sub.3) .delta.: 7.42 (2H, d, J=8.5 Hz),
7.19 (2H, d, J=8.5 Hz), 2.46 (2H, t, J=7.3 Hz), 1.40 (2H, m), 0.98
(2H, m), 0.86 (5H, m).
[1016] Propyl-
[1-(4-trimethylsilanylethynyl-phenyl)-cyclopropyl]-amine
(Intermediate 119)
[1017] Using General Procedure D;
[1-(4-bromophenyl)-cyclopropyl]-propylam- ine (Intermediate 118,
100.0 mg, 0.39 mmol) in triethylamine (8 mL) was treated with
copper(1)iodide (13.0 mg, 0.06 mmol) and then sparged with argon
for 5 minutes. Trimethylsilyl acetylene (0.70 g, 7.1 mmols) was
then added followed by dichlorobis(triphenylphosphine)palladium(II)
(48.0 mg, 0.06 mmol). The resulting reaction mixture was heated to
70.degree. C. for 5 days. The title compound (80.0 mg, 75%) was
isolated by chromatography (0-10% EtOAc-hexanes) as an orange
oil.
[1018] .sup.1H NMR (CDCl.sub.3) .delta.: 7.41 (2H, d, J=8.5 Hz),
7.21 (2H, d, J=8.5 Hz), 2.45 (2H, t, J=7.3 Hz), 1.39 (2H, m), 0.98
(2H, m), 0.87 (2H, m), 0.84 (3H, t, J=7.3 Hz), 0.24 (9H, s).
[1019] [1-(4-Ethynylphenyl)-cyclopropyl]-propylamine (Intermediate
120)
[1020] Using General Procedure E; propyl-[
1-(4-trimethylsilanylethynyl-ph- enyl)-cyclopropyl]-amine
(Intermediate 119, 80.0 mg, 0.30 mmols) in methanol (8 mL) was
treated with potassium carbonate (80.0 mg, 0.59 mmol) and stirred
overnight at ambient temperature. The crude alkyne (58 mg, 100%)
was used directly in the next reaction.
[1021] .sup.1H NMR (CDCl.sub.3) .delta.: 7.44 (2H, d, J=8.5 Hz),
7.24 (2H, d, J=8.5 Hz), 3.05 (1H, s), 2.46 (2H, t, J=7.3 Hz), 1.41
(2H, m), 1.00 (2H, m), 0.90 (2H, m), 0.86 (3H, t, J=7.3 Hz).
[1022] Ethyl
4-[4-(1-propylamino-cyclopropyl)-phenylethynyl]-benzoate (Compound
107, General Formula 2)
[1023] Using General Procedure F;
[1-(4-ethynylphenyl)-cyclopropyl]-propyl- amine (Intermediate 120,
38.0 mg, 0.19 mmol) and ethyl-4-iodo benzoate (Reagent A, 58.0 mg,
0.21 mmol) in triethyl amine (6 mL) was treated with
copper(I)iodide (8.0 mg, 0.04 mmol) and sparged with argon for 5
minutes. Dichlorobis(triphenylphosphine)palladium(II) (27 mg, 0.04
mmol) was added and the reaction mixture was stirred overnight at
room temperature. Column chromatography (5-15% EtOAc-hexanes)
afforded 40.0 mg (61%) of the title compound as an orange oil.
[1024] .sup.1H NMR (CDCl.sub.3) .delta.: 8.01 (2H, d, J=8.5 Hz),
7.57 (2H, d, J=8.5 Hz), 7.49 (2H, d, J=8.5 Hz), 7.28 (2H, d, J=8.5
Hz), 4.39 (2H, q, J=7.1 Hz), 2.49 (2H, t, J=7.3 Hz), 1.46 (2H, m),
1.41 (3H, t, J=7.1 Hz), 1.01 (2H, m), 0.89 (2H, m), 0.87 (3H, t,
J=7.3 Hz).
[1025] 4-[4-(1-Propylamino-cyclopropyl)-phenylethynyl]-benzoic acid
(Compound 108, General Formula 2)
[1026] Using General Procedure I; a solution of ethyl
4-[4-(1-propylamino-cyclopropyl)-phenylethynyl]-benzoate (Compound
107, 40.0 mg, 0.12 mmol) in ethanol (3 mL) and tetrahydrofuran (3
mL) was treated with NaOH (160.0 mg, 4.0 mmols, 2.0 mL of a 2N
aqueous solution) and stirred overnight at room temperature.
Work-up afforded 25.0 mg (69%) of the title compound as a
solid.
[1027] .sup.1H NMR (d.sub.6-DMSO) .delta.: 7.97 (2H, d, J=8.5 Hz),
7.65 (2H, d, J=8.5 Hz), 7.50 (2H, d, J=8.5 Hz), 7.36 (2H, d, J=8.5
Hz), 2.39 (2H, t, J=7.3 Hz), 1.37 (2H, m), 1.00 (2H, m), 0.93 (2H,
m), 0.84 (3H, t, J=7.3 Hz).
[1028] [1-(4-Bromophenyl)-cyclopropyl]-dipropylamine (Intermediate
121)
[1029] To a solution of 1-(4-bromophenyl)-cyclopropylamine
(Intermediate 116) in CH.sub.3CN/HOAc (5 mL, 9:1, v/v) and THF 3 mL
at 0.degree. C. was added propionaldehyde (277.0 mg, 4.95 mmols)
and NaCNBH.sub.3 (153.0 mg, 2.47 mmols). The reaction was warmed to
room temperature and after 5 hours quenched with H.sub.2O. The pH
of the solution was adjusted to 8-9 using aqueous NaOH and
extracted with EtOAc. The combined extracts were washed with
H.sub.2O and saturated aqueous NaCl, dried (MgSO.sub.4) and
concentrated under reduced pressure. The title compound, 190.0 mg
(56%), was isolated by column chromatography (2-5%
EtOAc-hexanes).
[1030] .sup.1H NMR (CDCl.sub.3).delta.: 7.42 (2H, d, J=8.3 Hz),
7.18 (2H, d, J=8.3 Hz), 2.39 (4H, t, J=7.3 Hz), 1.62-1.40 (4H, m),
0.96 (2H, m), 0.86 (6H, t, J=7.3 Hz), 0.80 (2H, m).
[1031]
Dipropyl-[1-(4-trimethylsilanylethynyl-phenyl)-cyclopropyl]-amine
(Intermediate 122)
[1032] Using General Procedure D;
[1-(4-bromophenyl)-cyclopropyl]-dipropyl- amine (Intermediate 121,
150.0 mg, 0.50 mmol) in triethylamine (5 mL) was treated with
copper(I)iodide (10.0 mg, 0.05 mmol) and then sparged with argon
for 5 minutes. Trimethylsilyl acetylene (0.70 g, 7.1 mmols) was
then added followed by dichlorobis(triphenylphosphine)palladium(II)
(35.0 mg, 0.05 mmol). The resulting reaction mixture was heated to
70.degree. C. for 5d. The title compound was isolated by
chromatography (0-3% EtOAc-hexanes).
[1033] .sup.1H NMR (CDCl.sub.3).delta.: 7.35 (2H, d, J=8.3 Hz),
7.24 (2H, d, J=8.3 Hz), 2.39 (4H, t, J=7.3 Hz), 1.55-1.42 (4H, m),
0.96 (2H, m), 0.88-0.79 (8H, m), 0.25 (9H, s).
[1034] [1-(4-Ethynylphenyl)-cyclopropyl]-dipropylamine
(Intermediate 123)
[1035] Using General Procedure E;
dipropyl-[1-(4-trimethylsilanylethynyl-p- henyl)-cyclopropyl]-amine
(Intermediate 122, 45.0 mg, 0.14 mmols) in methanol (5 mL) was
treated with potassium carbonate (50.0 mg, 0.37 mmol) and stirred
overnight at ambient temperature. The crude alkyne (34 mg, 100%)
was used directly in the next reaction.
[1036] .sup.1H NMR (CDCl.sub.3) .delta.: 7.42 (2H, d, J=8.3 Hz),
7.28 (2H, d, J=8.3 Hz), 2.40(4H, t, J=7.3 Hz), 1.53-1.40 (4H, m),
0.96 (2H, m), 0.90-0.79 (8H, m).
[1037] Ethyl
4-[4-(1-dipropylamino-cyclopropyl)-phenylethynyl]-benzoate
(Compound 109, General Formula 2)
[1038] Using General Procedure F;
[1-(4-ethynylphenyl)-cyclopropyl]-diprop- ylamine (Intermediate
123, 34.0 mg, 0.16 mmol) and ethyl-4-iodo benzoate (Reagent A, 59.0
mg, 0.21 mmol) in triethyl amine (6 mL) was treated with
copper(I)iodide (13.0 mg, 0.07 mmol) and sparged with argon for 5
minutes. Dichlorobis(triphenylphosphine)palladium(II) (49 mg, 0.07
mmol) was added and the reaction mixture was stirred overnight at
room temperature. Column chromatography (2-4% EtOAc-hexanes)
afforded the title compound as a yellow oil.
[1039] .sup.1H NMR (CDCl.sub.3) .delta.: 8.03 (2H, d, J=8.2 Hz),
7.58 (2H, d, J=8.2 Hz), 7.49 (2H, d, J=8.2 Hz), 7.30 (2H, d, J=8.2
Hz), 4.39 (2H, q, J=7.1 Hz), 2.43 (4H, t, J=7.3 Hz), 1.52-1.42 (4H,
m), 1.41 (3H, t, J=7.1 Hz), 0.99 (2H, m), 0.88-0.83 (8H, m).
[1040] 4-[4-(1-Dipropylamino-cyclopropyl)-phenylethynyl]-benzoic
acid (Compound 110, General Formula 2)
[1041] Using General Procedure I; a solution of ethyl
4-[4-(1-dipropylamino-cyclopropyl)-phenylethynyl]-benzoate
(Compound 109, 51.0 mg, 0.13 mmol) in ethanol (3 mL) and
tetrahydrofuran (3 mL) was treated with NaOH (80.0 mg, 2.0 mmols,
2.0 mL of a 1N aqueous solution) and stirred overnight at room
temperature. Work-up afforded 32.0 mg (70%) of the title compound
as a colorless solid.
[1042] .sup.1H NMR (d.sub.6-DMSO) .delta.: 7.98 (2H, d, J=8.3 Hz),
7.67 (6H, m), 3.05-2.89 (4H, m), 1.98 (2H, m), 1.72 (4H, m), 1.23
(2H, m), 0.88 (6H, t, J=7.3 Hz).
[1043] Benzyl-[1-(4-bromophenyl)-cyclopropyl]-amine (Intermediate
124) and Dibenzyl-[1-(4-bromophenyl)-cyclopropyl]-amine
(Intermediate 125)
[1044] A solution of 1-(4-bromophenyl)-cyclopropylamine
(Intermediate 116, 244.0 mg, 1.15 mmols) and benzyl bromide (255.0
mg, 1.50 mmols) in 4 mL DMF was stirred at 85.degree. C. for 6
hours, cooled to room temperature and stirred overnight. The
solution was diluted with H.sub.2O and the pH adjusted to 8-9 with
aqueous NaOH. The solution was extracted with EtOAc and the
combined organic layers were washed with H.sub.2O and saturated
aqueous NaCl, dried (MgSO.sub.4) and concentrated under reduced
pressure. Column chromatography (5-10% EtOAc-Hexanes) afforded 110
mg (32%) of the N-benzyl amine.
[1045] .sup.1H NMR (CDCl.sub.3) .delta.: 7.48 (2H, d, J=8.4 Hz),
7.30-7.23 (7H, m), 3.68 (2H, s), 1.07 (2H, m), 0.93 (2H, m); and
100 mg (22%) of the N,N-dibenzyl amine, .sup.1H NMR (CDCl.sub.3)
.delta.: 7.55 (2H, d, J=8.3 Hz), 7.40-7.19 (12H, m), 3.61 (4H, s),
0.87 (2H, m), 0.71 (2H, m).
[1046] Benzyl-
[1-(4-trimethylsilanylethynyl-phenyl)-cyclopropyl]-amine
(Intermediate 126)
[1047] Using General Procedure D;
benzyl-[1-(4-bromophenyl)-cyclopropyl]-a- mine (Intermediate 124,
110.0 mg, 0.36 mmol) in triethylamine (8 mL) was treated with
copper(I)iodide (10.0 mg, 0.05 mmol) and then sparged with argon
for 5 minutes. Trimethylsilyl acetylene (0.70 g, 7.1 mmols) was
then added followed by dichlorobis(triphenylphosphine)palladium(II)
(38.0 mg, 0.05 mmol). The resulting reaction mixture was heated to
70.degree. C. for 5d. The title compound 85 mg (74%) was isolated
by chromatography (1-10% EtOAc-hexanes).
[1048] .sup.1H NMR (CDCl.sub.3) .delta.: 7.46 (2H, d, J=8.3 Hz),
7.31-7.22 (7H, m), 3.67 (2H, s), 1.06 (2H, m), 0.94 (2H, m), 0.26
(9H, s).
[1049] Benzyl-[1-(4-ethynylphenyl)-cyclopropyl]-amine (Intermediate
127)
[1050] Using General Pocedure E;
benzyl-[1-(4-trimethylsilanylethynyl-phen- yl)-cyclopropyl]-amine
(Intermediate 126, 85.0 mg, 0.27 mmol) in methanol (5 mL) was
treated with potassium carbonate (50.0 mg, 0.37 mmol) and stirred
overnight at ambient temperature. The crude alkyne (65 mg, 100%)
was used directly in the next reaction.
[1051] .sup.1H NMR (CDCl.sub.3) .delta.: 7.49 (2H, d, J=7.9 Hz),
7.32 (2H, d, J=7.9 Hz), 7.23 (5H, m), 3.68 (2H, s), 3.08 (1H, s),
1.07 (2H, m), 0.95 (2H, m).
[1052] Ethyl
4-[4-(1-benzylamino-cyclopropyl)-phenylethynyl]-benzoate (Compound
111, General Formula 2)
[1053] Using General Procedure F;
benzyl-[1-(4-ethynylphenyl)-cyclopropyl]- -amine (Intermediate 127,
65.0 mg, 0.27 mmol) and ethyl-4-iodo benzoate (Reagent A, 68.0 mg,
0.27 mmol) in triethyl amine (8 mL) was treated with
copper(I)iodide (16.0 mg, 0.08 mmol) and sparged with argon for 5
minutes. Dichlorobis (triphenylphosphine)palladium(II) (58 mg, 0.08
mmol) was added and the reaction mixture was stirred overnight at
room temperature. Column chromatography (2-5% EtOAc-hexanes)
afforded 90 mg (90%) of the title compound as an orange solid.
[1054] .sup.1H NMR (CDCl.sub.3) .delta.: 8.05 (2H, d, J=8.3 Hz),
7.61 (2H, d, J=8.3 Hz), 7.55 (2H, d, J=8.1 Hz), 7.43 (2H, d, J=8.1
Hz), 7.32-7.22 (5H, m), 4.40 (2H, q, J=7.1 Hz), 3.72 (2H, s), 1.42
(2H, t, J=7.1 Hz), 1.01 (2H, m), 0.99 (2H, m).
[1055] 4-[4-(1-Benzylamino-cyclopropyl)-phenylethynyl]-benzoic acid
(Compound 112, General Formula 2)
[1056] Using General Procedure I; a solution of ethyl
4-[4-(1-benzylamino-cyclopropyl)-phenylethynyl]-benzoate (Compound
111, 75.0 mg, 0.19 mmol) in ethanol (4 mL) and tetrahydrofuran (4
mL) was treated with NaOH (80.0 mg, 2.0 mmols, 2.0 mL of a 1N
aqueous solution) and stirred overnight at room temperature.
Work-up afforded 35.0 mg (50%) of the title compound as a colorless
solid.
[1057] .sup.1H NMR (CD.sub.3OD) .delta.: 7.93 (2H, d, J=8.3 Hz),
7.61-7.51 (6H, m), 7.32-7.23 (5H, m), 3.98 (2H, s), 1.33(2H, m),
1.19 (2H, m).
[1058] Dibenzyl-[
1-(4-trimethylsilanylethynyl-phenyl)-cyclopropyl]-amine
(Intermediate 128)
[1059] Using General Procedure D;
dibenzyl-[1-(4-bromophenyl)-cyclopropyl]- -amine (Intermediate 125,
45.0 mg, 0.11 mmol) in triethylamine (8 mL) was treated with
copper(I)iodide (10.0 mg, 0.05 mmol) and then sparged with argon
for 5 minutes. Trimethylsilyl acetylene (0.35 g, 3.6 mmols) was
then added followed by dichlorobis(triphenylphosphine)palladium(II)
(35.0 mg, 0.05 mmol). The resulting reaction mixture was heated to
70.degree. C. for 5d. The title compound 40 mg (88%) was isolated
by chromatography (hexanes).
[1060] .sup.1H NMR (CDCl.sub.3) .delta.: 7.52 (2H, d, J=8.3 Hz),
7.36-7.24 (12H, m), 3.60 (4H, s), 0.87 (2H, m), 0.67 (2H, m), 0.29
(9H, s).
[1061] Dibenzyl-[1-(4-ethynylphenyl)-cyclopropyl]-amine
(Intermediate 129) Using General Procedure E;
dibenzyl-[1-(4-trimethylsilanylethynyl-phenyl)- -cyclopropyl]-amine
(Intermediate 128, 100.0 mg, 0.26 mmol) in methanol (5 mL) was
treated with potassium carbonate (60.0 mg, 0.44 mmol) and stirred
overnight at ambient temperature. The crude alkyne (80 mg,99%) was
used directly in the next reaction.
[1062] .sup.1H NMR (CDCl.sub.3) .delta.: 7.53 (2H, d, J=7.9 Hz),
7.36 (2H, d, J=7.9 Hz), 7.28-7.25 (10H, m), 3.62 (4H, s), 3.11
(1H,.s), 0.88 (2H, m), 0.68 (2H, m).
[1063] Ethyl
4-[4-(1-dibenzylamino-cyclopropyl)-phenylethynyl]-benzoate
(Compound 113, General Formula 2)
[1064] Using General Procedure F;
dibenzyl-[1-(4-ethynylphenyl)-cyclopropy- l]-amine (Intermediate
129, 40.0 mg, 0.12 mmol) and ethyl-4-iodo benzoate (Reagent A, 60.0
mg, 0.22 mmol) in triethylamine (5 mL) was treated with
copper(I)iodide (8.0 mg, 0.04 mmol) and sparged with argon for 5
minutes. Dichlorobis (triphenylphosphine)palladium(II) (27 mg, 0.04
mmol) was added and the reaction mixture was stirred overnight at
room temperature. Column chromatography (2-5% EtOAc-hexanes)
afforded the title compound as an oil.
[1065] .sup.1H NMR (CDCl.sub.3) .delta.: 8.04 (2H, d, J=8.5 Hz),
7.79 (4H, m), 7.42 (2H, d, J=7.9 Hz), 7.29-7.17 (1OH, m), 4.40 (2H,
q, J=7.1 Hz), 3.63 (4H, s), 1.42 (3H, t, J=7.1 Hz), 0.88 (2H, m),
0.73 (2H, m).
[1066] 4-[4-(1-Dibenzylamino-cyclopropyl)-phenylethynyl]-benzoic
acid (Compound 114, Formula 2)
[1067] Using General Procedure I; a solution of ethyl
4-[4-(1-dibenzylamino-cyclopropyl)-phenylethynyl]-benzoate
(Compound 113, 48.0 mg, 0.10 mmol) in ethanol (2 mL) and
tetrahydrofuran (2 mL) was treated with NaOH (80.0 mg, 2.0 mmols,
2.0 mL of a 1N aqueous solution) and stirred overnight at room
temperature. Work-up afforded 42.0 mg (93%) of the title compound
as a colorless solid.
[1068] .sup.1H NMR (d.sub.6-DMSO) .delta.: 7.98 (2H, d, J=8.2 Hz),
7.67 (2H, d, J=8.2 Hz), 7.64 (2H, d, J=7.9 Hz), 7.47 (2H, d, J=7.9
Hz), 7.28-7.20 (10H, m), 3.57 (4H, s), 0.84 (2H, m), 0.69 (2H,
m).
[1069] Benzyl-[ 1-(4-bromophenyl)-cyclopropyl]-methylamine
(Intermediate 130)
[1070] To a solution of
benzyl-[1-(4-bromophenyl)-cyclopropyl]-amine (Intermediate 124,
100.0 mg, 0.33 mmol) in 5 mL of acetone was added K.sub.2CO.sub.3
(91 mg, 0.66 mmol) and iodomethane (2.28 g, 16.1 mmols). The
resulting mixture was stirred at 25.degree. C. for 20 hours,
diluted with Et.sub.2O, and washed with H.sub.2O and saturated
aqueous NaCl. The solution was dried (MgSO.sub.4) and concentrated
under reduced pressure to give 90 mg (86%) of the title
compound.
[1071] .sup.1H NMR (CDCl.sub.3) .delta.: 7.47 (2H, d, J=8.5 Hz),
7.29-7.18 (7H, m), 3.53 (2H, s), 2.07 (3H, s), 1.07 (2H, m), 0.86
(2H, m).
[1072]
Benzyl-[1-(4-trimethylsilanylethynyl-phenyl)-cyclopropyl]-methylami-
ne (Intermediate 131)
[1073] Using General Procedure D; benzyl-[
1-(4-bromophenyl)-cyclopropyl]-- methylamine (Intermediate 130,
90.0 mg, 0.28 mmol) in triethylamine (8 mL) was treated with
copper(I)iodide (6.0 mg, 0.03 mmol) and then sparged with argon for
5 minutes. Trimethylsilyl acetylene (0.70 g, 7.1 mmols) was then
added followed by dichlorobis(triphenylphosphine)palladium(II)
(20.0 mg, 0.03 mmol). The resulting reaction mixture was heated to
70.degree. C. for 5 days. The title compound 80 mg (84%) was
isolated by chromatography (0-2% EtOAc-hexanes).
[1074] .sup.1H NMR (CDCl.sub.3) .delta.: 7.46 (2H, d, J=8.2 Hz),
7.32-7.18 (7H, m), 3.52 (2H, s), 2.06 (3H, s), 1.06 (2H, m),
0.87(2H, m), 0.26 (9H, s).
[1075] Benzyl-[1-(4-ethynylphenyl)-cyclopropyl]-methylamine
(Intermediate 132)
[1076] Using General Procedure E;
benzyl-[1-(4-trimethylsilanylethynyl-phe-
nyl)-cyclopropyl]-methylamine (Intermediate 131, 80.0 mg, 0.24
mmol) in methanol (5 mL) was treated with potassium carbonate (80.0
mg, 0.59 mmol) and stirred overnight at ambient temperature. The
crude alkyne (60 mg, 99%) was used directly in the next
reaction.
[1077] .sup.1H NMR (CDCl.sub.3) .delta.: 7.49 (2H, d, J=8.2 Hz),
7.33-7.21 (7H, m), 3.55 (2H, s), 3.08 (1H, s), 2.08 (3H, s), 1.07
(2H, m), 0.89 (2H, m).
[1078] Ethyl 4-{
4-[1-(benzyl-methylamino)-cyclopropyl]-phenylethynyl}-ben- zoate
(Compound 115, General Formula 2)
[1079] Using General Procedure F;
benzyl-[1-(4-ethynylphenyl)-cyclopropyl]- -methylamine
(Intermediate 132, 70.0 mg, 0.28 mmol) and ethyl-4-iodo benzoate
(Reagent A, 77.0 mg, 0.28 mmol) in triethylamine (5 mL) was treated
with copper(I)iodide (18.0 mg, 0.10 mmol) and sparged with argon
for 5 minutes. Dichlorobis (triphenylphosphine)palladium(II) (65
mg, 0.10 mmol) was added and the reaction mixture was stirred
overnight at room temperature. Column chromatography (2-5%
EtOAc-hexanes) afforded 86 mg (75%) of the title compound as an
oil.
[1080] .sup.1H NMR (CDCl.sub.3) .delta.:8.03 (2H, d, J=8.5 Hz),
7.59 (2H, d, J=8.5 Hz), 7.53 (2H, d, J=8.2 Hz), 7.36 (2H, d, J=8.2
Hz),7.25 (5H, m), 4.39 (2H, q, J=7.1 Hz), 3.57 (2H, s), 2.10 (3H,
s), 1.41 (3H, t, J=7.1 Hz), 1.10 (2H, m), 0.92 (2H, m).
[1081]
4-[4-(1-Benzylmethylamino-cyclopropyl)-phenylethynyl]-benzoic acid
(Compound 116, General Formula 2)
[1082] Using General Procedure I; a solution of ethyl
4-{4-[1-(benzyl-methylamino)-cyclopropyl]-phenylethynyl }-benzoate
(Compound 115, 65.0 mg, 0.16 mmol) in ethanol (3 mL) and
tetrahydrofuran (3 mL) was treated with NaOH (80.0 mg, 2.0 mmols,
2.0 mL of a 1N aqueous solution) and stirred overnight at room
temperature. Work-up afforded 45.0 mg (75%) of the title compound
as a solid.
[1083] .sup.1H NMR (d.sub.6-DMSO) .delta.: 7.96 (2H, d, J=8.3 Hz),
7.66 (2H, d, J=8.3 Hz), 7.58 (2H, d, J=8.2 Hz), 7.42 (2H, d, J=8.2
Hz), 7.29-7.18 (5H, m), 3.52 (2H, s), 2.00 (3H, s),1.02 (2H, m),
0.87 (2H, m).
[1084] (4-Bromo-2-methyl-phenyl)-methanol (Intermediate 133)
[1085] A solution of methyl 4-bromo-2-methyl-benzoate (1.05 g, 4.58
mmols) in 10 mL of Et.sub.2O was cooled to 0.degree. C. and treated
with LiAlH.sub.4 (177.0 mg, 4.58 mmols), stirred for 3 hours, and
then carefully quenched with H.sub.2O. The mixture was extracted
with Et.sub.2O and the combined organic layers were washed with
H.sub.2O and saturated aqueous NaCl, dried (MgSO.sub.4), and
concentrated under reduced pressure. The title compound, 830.0 mg
(90%), was isolated by column chromatography (10-30% EtOAc-hexanes)
as a colorless oil.
[1086] .sup.1H NMR (CDCl.sub.3) .delta.: 7.30 (2H, m), 7.18 (1H, d,
J=8.8 Hz), 4.57 (2H, d, J=5.5 Hz), 2.27 (3H, s), 2.13 (1H, t, J=5.5
Hz).
[1087] (4-Bromo-2-methyl-benzyloxy)-trimethylsilane (Intermediate
134)
[1088] To a solution of (4-bromo-2-methyl-phenyl)-methanol
(Intermediate 133, 500.0 mg, 2.48 mmols), in 10 mL THF was added
triethylamine (374.0 mg, 3.70 mmols) and chlorotrimethylsilane
(297.0 mg, 2.70 mmols). The resulting solution was stirred for 17
hours at 25.degree. C. and then treated with H.sub.2O and extracted
with Et.sub.2O. The combined organic layers were washed with
H.sub.2O; 10% aqueous HCl, saturated NaHCO.sub.3, and saturated
NaCl before being dried (MgSO.sub.4) and concentrated under reduced
pressure. The title compound, 550.0 mg (81%), was isolated by
column chromatography (5% EtOAc-hexanes) as a colorless oil.
[1089] .sup.1H NMR (CDCl.sub.3) .delta.: 7.35-7.28 (3H, m), 4.64
(2H, s), 2.29 (3H, s), 0.20 (9H, s).
[1090]
2-Methyl-4-trimethylsilanylethynyl-1-trimethylsilanyloxymethyl-benz-
ene (Intermediate 135)
[1091] Using General Procedure D;
(4-bromo-2-methyl-benzyloxy)-trimethylsi- lane (Intermediate 134,
550.0 mg, 2.01 mmol) in triethylamine (8 mL) was treated with
copper(I)iodide (38.0 mg, 0.20 mmol) and then sparged with argon
for 5 minutes. Trimethylsilyl acetylene (1.05 g, 10.6 mmols) was
then added followed by dichlorobis(triphenylphosphine)palladium(II)
(142.0 mg, 0.20 mmol). The resulting reaction mixture was heated to
70.degree. C. for 5 days. The title compound (380.0 mg, 65%) was
isolated by chromatography (0-2% EtOAc-hexanes) as an orange
oil.
[1092] .sup.1H NMR (CDCl.sub.3) .delta.: 7.31 (3H, m), 4.64 (2H,
s), 2.24 (3H, s), 0.24 (9H, s), 0.15 (9H, s).
[1093] (4-Ethynyl-2-methyl-phenyl)-methanol (Intermediate 136)
[1094] Using General Procedure E;
2-methyl-4-trimethylsilanylethynyl-1-tri-
methylsilananyloxymethyl-benzene (Intermediate 135, 380.0 mg, 1.30
mmols) in methanol (10 mL) was treated with potassium carbonate
(180.0 mg, 1.3 mmol) and stirred overnight at ambient temperature.
The crude alkyne was purified by column chromatography (5-20%
EtOAc-hexanes) to give 100.0 mg (34%) of the title compound.
[1095] .sup.1H NMR (CDCl.sub.3) .delta.: 7.06 (3H, m), 4.42 (2H, d,
J=5.2 Hz), 2.81 (1H, s), 2.05 (3H, s), 1.59 (1H, t, J=5.2 Hz).
[1096] Ethyl 4-(4-hydroxymethyl-3-methyl-phenylethynyl)-benzoate
(Compound 117, General Formula 6)
[1097] Using General Procedure F;
(4-ethynyl-2-methyl-phenyl)-methanol (Intermediate 136, 100.0 mg,
0.44 mmol) and ethyl-4-iodo benzoate (Reagent A, 125.0 mg, 0.45
mmol) in triethyl amine (4 mL) was treated with copper(I)iodide (29
mg, 0.15 mmol) and sparged with argon for 5 minutes.
Dichlorobis(triphenylphosphine)palladium(II) (102 mg, 0.15 mmol)
was added and the reaction mixture was stirred overnight at room
temperature. Column chromatography (20-40% EtOAc-hexanes) afforded
130.0 mg (99%) of the title compound as an orange solid.
[1098] .sup.1H NMR (CDCl.sub.3) .delta.: 7.98 (2H, d, J=8.2 Hz),
7.56 (2H, d, J=8.2 Hz), 7.36 (3H, m), 4.65 (2H, s), 4.36 (2H, q,
J=7.1 Hz), 2.40 (1H, s), 2.30 (3H, s), 1.39 (3H, t, J=7.1 Hz).
[1099] Ethyl 4-(4-bromomethyl-3-methyl-phenylethynyl)-benzoate
(Intermediate 137)
[1100] A solution of ethyl
4-(4-hydroxymethyl-3-methyl-phenylethynyl)-benz- oate (Compound
117, 130.0 mg, 0.44 mmol) and triphenylphosphine (150.0 mg, 0.57
mmol) in 5 mL CH.sub.2Cl.sub.2 was cooled to .sup.0.degree. C. and
N-bromosuccinimide (101.0 mg, 0.57 mmol) was added in 5 portions
over 20 minutes. The solution was warmed to 25.degree. C. and
stirred for 17 hours. The reaction was quenched by the addition of
dilute aqueous NaHCO.sub.3. The resulting mixture was extracted
with Et.sub.2O and the combined organic layers were washed with
H.sub.2O and saturated aqueous NaCl before being dried
(Na.sub.2SO.sub.4) and concentrated under reduced pressure. The
title compound, 120.0 mg (76%), was isolated by column
chromatography (2-5% EtOAc-hexanes) as a colorless solid.
[1101] .sup.1H NMR (CDCl.sub.3) .delta.: 8.01 (2H, d, J=8.1 Hz),
7.56 (2H, d, J=8.1 Hz), 7.32 (3H, m), 4.48 (2H, s), 4.38 (2H, q,
J=7.1 Hz), 2.40 (3H, s), 1.39 (3H, t, J=7.1 Hz).
[1102] Ethyl
4-(4-imidazol-1-yl-methyl-3-methyl-phenylethynyl)-benzoate
(Compound 118, General Formula 6)
[1103] A solution of imidazole (30.0 mg, 0.44 mmol) in 2 mL DMF was
treated with NaH (11.0 mg, 0.44 mmol) and heated to 90.degree. C.
After 1 h a solution of ethyl
4-(4-bromomethyl-3-methyl-phenylethynyl)-benzoate (Intermediate
137, 120.0 mg, 0.34 mmol) in 2 mL DMF was added and stirring at
90.degree. C. continued for 1 hour. The solution was cooled to room
temperature and concentrated under reduced pressure. The title
compound, 90.0 mg (71%) was isolated by column chromatography
(20-100% EtOAc-hexanes) as a colorless solid.
[1104] .sup.1H NMR (CDCl.sub.3) .delta.: 8.02 (2H, d, J=8.5 Hz),
7.57 (2H, d, J=8.5 Hz), 7.51 (1H, s), 7.40 (1H, s), 7.36 (1H, dd,
J=1.2, 7.9 Hz), 7.10 (1H, s), 6.93 (1H, d, J=7.9 Hz), 6.88 (1H, t,
J=1.7 Hz), 5.12 (2H, s), 4.38 (2H, q, J=7.1 Hz), 2.27 (3H, s), 1.40
(3H, t, J=7.1 Hz).
[1105] 4-(4-Imidazol-1-yl-methyl-3-methyl-phenylethynyl)-benzoic
acid (Compound 119, General Formula 6)
[1106] Using General Procedure I; a solution of ethyl
4-(4-imidazol-1-ylmethyl-3-methyl-phenylethynyl)-benzoate (Compound
118, 82.0 mg, 0.24 mmol) in ethanol (3 mL) and tetrahydrofuran (3
mL) was treated with NaOH (120.0 mg, 3.0 mmols, 3.0 mL of a 1N
aqueous solution) and stirred overnight at room temperature.
Work-up afforded 51.0 mg (68%) of the title compound as a
solid.
[1107] .sup.1H NMR (d.sub.6-DMSO) .delta.: 9.20 (1H, s), 7.97 (2H,
d, J=8.2 Hz), 7.73 (2H, m), 7.65 (2H, d, J=8.2 Hz), 7.52 (1H, s),
7.46 (1H, d, J=7.9 Hz), 7.13 (1H, d, J=7.9 Hz), 5.50 (2H, s), 2.32
(3H, s).
[1108] 4-Bromo-1-bromomethyl-2-methyl-benzene (Intermediate
138)
[1109] A solution of (4-bromo-2-methyl-phenyl)-methanol
(Intermediate 133, 319.0 mg, 1.58 mmol) and triphenylphosphine
(466.0 mg, 1.74 mmol) in 5 mL CH.sub.2Cl.sub.2 was cooled to
0.degree. C. and N-bromosuccinimide (309.0 mg, 1.74 mmol) was added
in 5 portions over 20 minutes. The solution was warmed to
25.degree. C. and stirred for 17 hours. The reaction was quenched
by the addition of dilute aqueous NaHCO.sub.3. The resulting
mixture was extracted with Et.sub.2O and the combined organic
layers were washed with H.sub.2O and saturated aqueous NaCl before
being dried (Na.sub.2SO.sub.4) and concentrated under reduced
pressure. The title compound, 350.0 mg (84%), was isolated by
column chromatography (2-3% EtOAc-hexanes) as a colorless oil.
[1110] .sup.1H NMR (CDCl.sub.3) .delta.: 7.32 (1H, d, J=2.0 Hz),
7.29 (1H, dd, J=2.0, 7.9 Hz), 7.15 (1H, d, J=7.9 Hz), 4.43 (2H, s),
2.37 (3H, s).
[1111] 1-(4-Bromo-2-methyl-benzyl)-1H-imidazole (Intermediate
139)
[1112] A solution of imidazole (58.0 mg, 0.86 mmol) in 3 mL DMF was
treated with NaH (20.0 mg, 0.86 mmol) and heated to 90.degree. C.
After 1 h a solution of 4-bromo-1-bromomethyl-2-methyl-benzene
(Intermediate 138, 190.0 mg, 0.72 mmol) in 3 mL DMF was added and
stirring at 90.degree. C. continued for 1 hour. The solution was
cooled to room temperature and concentrated under reduced pressure.
The title compound, 160.0 mg (88%) was isolated by column
chromatography (5% MeOH-EtOAc) as a colorless solid.
[1113] .sup.1H NMR (CDCl.sub.3) .delta.: 7.46 (1H, s), 7.34 (1H,
dd, J=1.8 Hz), 7.30 (1H, dd, J=1.8, 8.2 Hz), 7.08 (1H, t, J=1.2
Hz), 6.83 (1H, t, J=1.2 Hz), 6.80 (1H, d, J=8.2 Hz), 5.03 (2H, s),
2.23 (3H, s).
[1114] 1-(2-Methyl-4-trimethylsilanylethynyl-benzyl)-1 H-imidazole
(Intermediate 140)
[1115] Using General Procedure D;
1-(4-bromo-2-methyl-benzyl)-1H-imidazole (Intermediate 139, 160.0
mg, 0.64 mmol) in triethylamine (8 mL) was treated with
copper(I)iodide (12.0 mg, 0.07 mmol) and then sparged with argon
for 5 minutes. Trimethylsilyl acetylene (0.70 g, 0.71 mmols) was
then added followed by dichlorobis(triphenylphosphine)palladium(II)
(45.0 mg, 0.07 mmol). The resulting reaction mixture was heated to
70.degree. C. for 5 days. The title compound (140.0 mg, 82%) was
isolated by chromatography (5% MeOH-EtOAc ) as an orange oil.
[1116] .sup.1H NMR (CDCl.sub.3) .delta.: 7.53 (1H, s), 7.38 (1H,
s), 7.34 (1H, d, J=8.0 Hz), 7.15 (1H, s), 6.94(1H, s), 6.91 (1H, d,
J=8.0 Hz), 5.14 (2H, s), 2.29 (3H, s), 0.31 (9H, s).
[1117] 1-(4-Ethynyl-2-methyl-benzyl)-1H-imidazole (Intermediate
141)
[1118] Using General Procedure E;
1-(2-methyl-4-trimethylsilanylethynyl-be- nzyl)-1H-imidazole
(Intermediate 140, 140.0 mg, 0.53 mmols) in methanol (5 mL) was
treated with potassium carbonate (100.0 mg, 0.72 mmol) and stirred
overnight at ambient temperature. The crude alkyne (105 mg, 100%)
was used directly in the next reaction.
[1119] .sup.1H NMR (CDCl.sub.3) .delta.: 7.49 (1H, s), 7.35 (1H,
s), 7.31 (1H, dd, J=1.7, 7.9 Hz), 7.10 (1H, s), 6.69 (1H, d, J=7.9
Hz), 6.85 (1H, t, J=1.2 Hz), 5.14 (2H, s), 3.08 (1H, s), 2.26 (3H,
s).
[1120] Methyl
[4-(4-imidazol-1-yl-methyl-3-methyl-phenylethynyl)-phenyl]-a-
cetate (Compound 120, General Formula 6)
[1121] Using General Procedure F;
1-(4-ethynyl-2-methyl-benzyl)-1H-imidazo- le (Intermediate 141,
101.0 mg, 0.53 mmol) and methyl-(4-iodophenyl)-aceta- te (Reagent
B, 145.0 mg, 0.53 mmol) in triethylamine (5 mL) was treated with
copper(I)iodide (34.0 mg, 0.18 mmol) and sparged with argon for 5
minutes. Dichlorobis(triphenylphosphine)palladium(II) (124 mg, 0.18
mmol) was added and the reaction mixture was stirred overnight at
room temperature. Column chromatography (5% MeOH-EtOAc) afforded
45.0 mg (25%) of the title compound as an orange oil.
[1122] .sup.1H NMR (CDCl.sub.3) .delta.: 7.47 (3H, m), 7.35 (3H,
m), 7.27 (3H, m), 6.91 (1H, d, J=7.3 Hz), 5.11 (2H, s), 3.70 (3H,
s), 3.64 (2H, s), 2.26 (3H, s).
[1123]
[4-(4-Imidazol-1-yl-methyl-3-methyl-phenylethynyl)-phenyl]-acetic
acid (Compound 121, General Formula 6)
[1124] Using General Procedure l; a solution of methyl
[4-(4-imidazol-1-ylmethyl-3-methyl-phenylethynyl)-phenyl]-acetate
(Compound 120, 45.0 mg, 0.13 mmol) in ethanol (2 mL) and
tetrahydrofuran (2 mL) was treated with NaOH (80.0 mg, 2.0 mmols,
2.0 mL of a 1N aqueous solution) and stirred overnight at room
temperature. Work-up afforded 30.0 mg (70%) of the title compound
as a pale-orange solid.
[1125] .sup.1H NMR (d.sub.4-MeOH) .delta.: 8.97 (1H, s), 7.60 (2H,
d J=8.8 Hz), 7.47 (3H, m), 7.41 (1H, d, J=7.9 Hz), 7.30 (2H, d,
J=7.9 Hz), 7.23 (1H, d, J=7.9 Hz), 5.51 (2H, s), 3.64 (2H, s), 2.33
(3H, s).
[1126] 1-Isopropyl-3-methoxy-benzene (Intermediate 142)
[1127] To a solution of 3-isopropyl-phenol (5.00 g, 36.2 mmols) in
50 mL of acetone was added K.sub.2CO.sub.3 (7.50 g, 54.3 mmols) and
iodomethane (10.3 g, 72.5 mmols). The resulting solution was heated
to 50.degree. C. and stirred for 18 hours, cooled to room
temperature, and concentrated under reduced pressure. The residual
oil was dissolved in Et.sub.2O and washed with H.sub.2O, saturated
aqueous NaHCO.sub.3, and saturated aqueous NaCl before being dried
(MgSO.sub.4) and concentrated under reduced pressure. The crude
methyl ether was used without further purification.
[1128] .sup.1H NMR (CDCl.sub.3) .delta.: 7.22 (1H, t, J=8.1 Hz),
6.84-6.72 (3H, m), 3.81 (3H, s), 2.88 (1H, septet, J=7.0 Hz), 1.25
(6H, d, J=7.0 Hz).
[1129] 1-Bromo-2-isopropyl-4-methoxy-benzene (Intermediate
143).
[1130] A mixture of 1-isopropyl-3-methoxy-benzene (Intermediate
142, 3.50 g, 23.3 mmols), molecular sieves, and silica gel in 150
mL CCl.sub.4 was treated with N-bromosuccinimide (4.98 g, 28.0
mmols) at 35.degree. C. for 18 hours. An additional portion of
N-bromosuccinimide (830.0 mg, 4.46 mmols) was added and stirring
continued for 6 hours. The mixture was cooled to room temperature,
H.sub.2O was added, and the mixture was filtered to remove the
solids. The mixture was extracted with E.sub.2O and the combined
organic layers were washed with 10% aqueous HCl, H.sub.2O,
saturated aqueous NaHCO.sub.3, and saturated NaCl before being
dried (MgSO.sub.4) and concentrated under reduced pressure. Column
chromatography (2.5% EtOAc-hexanes) afforded 4.34 g (81%) of the
title compound as a pale-yellow oil.
[1131] .sup.1H NMR (CDCl.sub.3) .delta.: 7.41 (1H, d, J=8.8 Hz),
6.82 (1H, d, J=2.6 Hz), 6.61 (1H, dd, J=2.6, 8.8 Hz), 3.79 (3H, s),
3.31 (1H, septet, J=6.7 Hz), 1.23 (6H, d, J=6.7 Hz).
[1132] 4-Bromo-3-isopropyl-phenol (Intermediate 144)
[1133] To a solution of 1-bromo-2-isopropyl-4-methoxy-benzene
(Intermediate 143, 2.20 g, 9.60 mmols) in 50 mL CH.sub.2Cl.sub.2 at
-78.degree. C. was added BBr.sub.3 (4.81 g, 19.2 mmols; 19.2 mL of
a 1M solution in CH.sub.2Cl.sub.2). After stirring for 3 hours at
-78.degree. C. the solution was warmed to 0.degree. C. for 3 hours
and then at 25.degree. C. for 1 hour before being quenched with
H.sub.2O. The mixture was diluted with Et.sub.2O and washed with
H.sub.2O and saturated aqueous NaCl, dried (Na.sub.2SO.sub.4) and
concentrated under reduced pressure. Column chromatography (2.5-10%
EtOAc-hexanes) afforded the title compound as a colorless oil.
[1134] .sup.1H NMR (CDCl.sub.3) .delta.: 7.38 (1H, d, J=8.5 Hz),
6.79 (1H, d, J=2.9 Hz), 6.57 (1H, dd, J=2.9, 8.5 Hz), 3.31 (1H,
septet, J=7.0 Hz), 1.22 (6H, d, J=7.0 Hz).
[1135] (4-Bromo-3-isopropyl-phenoxy)-tert-butyl-dimethyl-silane
(Intermediate 145)
[1136] A solution of 4-bromo-3-isopropyl-phenol (Intermediate 144,
1.13 g, 5.25 mmols), chloro-tert-butyl-dimethylsilane (0.95 g, 6.30
mmols), and imidazole (428.0 mg, 6.3 mmols) in 10 mL DMF was
stirred at 25.degree. C. for 3 hours. The solution was diluted with
H.sub.2O and extracted with Et.sub.2O and the combined organic
layers were washed with H.sub.2O, saturated aqueous NaCl, and dried
(MgSO.sub.4) before being concentrated under reduced pressure.
Column chromatography (1-2% EtOAc-hexanes) afforded 1.50 g (87%) of
the title compound as a colorless oil.
[1137] .sup.1H NMR (CDCl.sub.3) .delta.: 7.32 (1H, d, J=8.8 Hz),
6.73 (1H, d, J=3.0 Hz), 6.52 (1H, dd, J=3 .0, 8.8 Hz), 3.26 (1H,
septet, J=6.7 Hz), 1.19 (6H, d, J=6.7 Hz), 0.96 (9H, s), 0.17 (6H,
s).
[1138] 4-(Tert-butyl-dimethyl-silanyloxy)-2-isopropyl-benzaldehyde
(Intermediate 146)
[1139] A solution of
(4-bromo-3-isopropyl-phenoxy)-tert-butyl-dimethyl-sil- ane
(Intermediate 145, 1.03 g, 3.13 mmols) in 25 mL E.sub.2O was cooled
to -78.degree. C. and treated with tert-butyllithium (401.0 mg,
6.26 mmols; 3.7 mL of a 1.7M solution in pentane). After 30 minutes
the reaction was quenched with DMF (913.0 mg, 12.5 mmols) and
warmed to room temperature. The solution was diluted with H.sub.2O,
extracted with Et.sub.2O and the combined organic layers washed
with H.sub.2O and saturated aqueous NaCl before being dried
(MgSO.sub.4) and concentrated under reduced pressure. Column
chromatography (2% EtOAc-hexanes) afforded 480.0 mg (55%) of the
title compound as a colorless oil.
[1140] .sup.1H NMR (CDCl.sub.3) .delta.: 10.19 (1H, s), 7.72 (1H,
d, J=8.5 Hz), 6.85 (1H, d, J=2.3 Hz), 6.77 (1H, dd, J=2.3, 8.5 Hz),
3.97 (1H, septet, J=6.7 Hz), 1.27 (6H, d, J=6.7 Hz), 1.00 (9H, s),
0.25 (6H, s).
[1141] 4-Hydroxy-2-isopropyl-benzaldehyde (Intermediate 147)
[1142] To a solution of
4-(tert-butyl-dimethyl-silanyloxy)-2-isopropyl-ben- zaldehyde
(Intermediate 146, 880.0 mg, 3.17 mmols) in 6 mL THF at 0.degree.
C. was added tetrabutylammonium fluoride (1.66 g, 6.33 mmols; 6.3
mL of a 1M solution in THF). The pale-yellow solution was stirred
for 30 minutes and quenched by the addition of ice cold H.sub.2O.
The mixture was extracted with Et.sub.2O and the combined organic
layers were washed with H.sub.2O and saturated aqueous NaCl before
being dried (Na.sub.2SO.sub.4) and concentrated under reduced
pressure. Column chromatography (20% EtOAc-hexanes) afforded 500.0
mg (96%) of the title compound as a colorless solid.
[1143] .sup.1H NMR (CDCl.sub.3) .delta.: 10.15 (1H, s), 7.79 (1H,
d, J=8.5 Hz), 6.95 (1H, d, J=2.3 Hz), 6.86 (1H, dd, J=2.3, 8.5 Hz),
3.96 (1H, septet, J=6.7 Hz), 1.29 (6H, d, J=6.7 Hz).
[1144] 4-Formyl-3-isopropyl-phenyl 1,1,1-trifluoro-methansulfonate
(Intermediate 148)
[1145] A solution of 4-hydroxy-2-isopropyl-benzaldehyde
(Intermediate 147, 300.0 mg, 1.83 mmol) in 10 mL of
CH.sub.2Cl.sub.2 was cooled to .sup.0.degree. C. and to it was
added 2-[N,N-bis(trifluoromethylsulfonyl)- amino]-5-chloropyridine
(754.0 mg, 1.92 mmol) and triethylamine (592.0 mg, 5.85 mmols). The
resulting solution was warmed to room temperature and stirred for
4.5 hours. The reaction was quenched by the addition of H.sub.2O
and the mixture extracted with EtOAc and the combined organic
layers were washed with 10% aqueous HCl, saturated aqueous
NaHCO.sub.3, H.sub.2O, and saturated aqueous NaCl. The solution was
dried (MgSO.sub.4) and concentrated under reduced pressure. The
title compound was isolated by column chromatography (5-10%
EtOAc-hexanes) as a colorless oil, 470.0 mg (87%).
[1146] .sup.1H NMR (CDCl.sub.3) .delta.:10.37 (1H, s), 7.94 (1H, d,
J=8.5 Hz), 7.33 (1H, d, J=2.3 Hz), 7.26 (1H, dd, J=2.3, 8.5 Hz),
4.00 (1H, septet, J=6.7 Hz), 1.33 (6H, d, J=6.7 Hz),
[1147] 4-Hydroxymethyl-3-isopropyl-phenyl
1,1,1-trifluoro-methansulfonate (Intermediate 149)
[1148] To a solution of 4-formyl-3-isopropyl-phenyl
1,1,1-trifluoro-methanesulfonate (Intermediate 148, 540.0 mg, 1.82
mmols) in 7 mL MeOH at 0.degree. C. was added NaBH.sub.4 (72.0 mg,
1.91 mmols). After stirring 2 hours at 0 .degree. C. the reaction
was carefully quenched with H.sub.2O and extracted with Et.sub.2O.
The combined organic layers were washed with H.sub.2O and saturated
aqueous NaCl, dried (MgSO.sub.4), and concetrated under reduced
pressure. The title compound was isolated by column chromatography
(5-10% EtOAc-hexanes) as a colorless oil, 355.0 mg (90%).
[1149] .sup.1H NMR (CDCl.sub.3).delta.: 7.45 (1H, d, J=8.5 Hz),
7.17 (1H, d, J=2.7 Hz), 7.08 (1H, dd, J=2.7, 8.5 Hz), 4.74 (2H, d,
J=5.3 Hz), 3.21 (1H, septet, J=7.0 Hz), 2.12 (1H, t, J=5.3 Hz),
1.24 (6H, d, J=7.0 Hz).
[1150] 4-(Tert-butyl-dimethyl-silanyloxymethyl)-3-isopropyl-phenyl
1,1,1-trifluoro-methansulfonate (Intermediate 150)
[1151] A solution of 4-hydroxymethyl-3-isopropyl-phenyl
1,1,1-trifluoro-methansulfonate (Intermediate 149, 760.0 mg, 2.55
mmols), chloro-tert-butyl-dimethylsilane (470.0 mg, 3.18 mmols),
and imidazole (225.0 mg, 3.25 mmols) in 6 mL DMF was stirred at
25.degree. C. for 17 hours. The solution was diluted with H.sub.2O
and extracted with Et.sub.2O and the combined organic layers were
washed with 10% aqueous HCl, saturated aqueous NaHCO.sub.3,
H.sub.2O, and saturated aqueous NaCl, and dried (MgSO.sub.4) before
being concentrated under reduced pressure. Column chromatography
(2-5% EtOAc-hexanes) afforded 970.0 mg (92%) of the title compound
as a colorless oil.
[1152] .sup.1H NMR (CDCl.sub.3) .delta.: 7.49 (1H, d, J=8.5 Hz),
7.10 (1H, d, J=2.3 Hz), 7.06 (1H, dd, J=2.3, 8.5 Hz), 4.75 (2H, s),
3.10 (1H, septet, J=6.7 Hz), 1.21 (6H, d, J=6.7 Hz), 0.93 (9H, s),
0.10 (6H, s).
[1153]
1-(Tert-butyl-dimethyl-silanyloxymethyl)-2-isopropyl-4-trimethylsil-
anylethynyl-benzene (Intermediate 151)
[1154] To a solution of
4-(tert-butyl-dimethyl-silanyloxymethyl)-3-isoprop- yl-phenyl
1,1,1-trifluoro-methansulfonate (Intermediate 150, 970.0 mg, 2.35
mmols) in triethylamine (2 mL) and 6 mL DMF was sparged with argon
for 15 minutes. Trimethylsilyl acetylene (1.00 g, 10.6 mmols) was
then added followed by dichlorobis(triphenylphosphine)palladium(II)
(66.0 mg, 0.09 mmol). The resulting reaction mixture was heated to
95.degree. C. for 20 hours. The solution was cooled to room
temperature and concentrated under reduced pressure. The title
compound (200.0 mg, 78%) was isolated by chromatography (0-25%
EtOAc-hexanes) as an orange oil.
[1155] .sup.1H NMR (CDCl.sub.3) .delta.: 7.37-7.25 (3H, m), 4.75
(2H, s), 3.08 (1H, septet, J=7.0 Hz), 1.21 (6H, d, J=7.0 Hz), 0.92
(9H, s), 0.25 (9H, s), 0.09 (6H, s).
[1156] Tert-butyl-(4-ethynyl-2-isopropyl-benzyloxy)-dimethyl-silane
(Intermediate 152)
[1157] Using General Procedure E;
1-(tert-butyl-dimethyl-silanyloxymethyl)-
-2-isopropyl-4-trimethylsilanylethynyl-benzene (Intermediate 151,
850.0 mg, 2.36 mmols) in methanol (25 mL) was treated with
potassium carbonate (250.0 mg, 1.81 mmols) and stirred overnight at
ambient temperature. The crude alkyne (650 mg, 95%) was used
directly in the next reaction.
[1158] .sup.1H NMR (CDCl.sub.3) .delta.: 7.41-7.25 (3H, m), 4.77
(2H, s), 3.07 (1H, septet, J=7.0 Hz), 3.05 (1H, s), 1.22 (6H, d,
J=7.0 Hz), 0.94 (9H, s), 0.1 1 (6H, s).
[1159] Ethyl
4-[4-(tert-butyl-dimethyl-silanyloxymethyl)-3-isopropyl-pheny-
lethynyl]-benzoate (Intermediate 153)
[1160] Using General procedure F;
tert-butyl-(4-ethynyl-2-isopropyl-benzyl- oxy)-dimethyl-silane
(Intermediate 152, 300.0 mg, 1.04 mmols) and ethyl-4-iodo benzoate
(Reagent A, 287.0 mg, 1.04 mmols) in triethylamine (8 mL) was
treated with copper(I)iodide (50.0 mg, 0.26 mmol) and sparged with
argon for 5 minutes. Dichlorobis(triphenylphosphine)palladium(II)
(182 mg, 0.26 mmol) was added and the reaction mixture was stirred
overnight at room temperature. Column chromatography (2-4%
EtOAc-hexanes) afforded 310.0 mg (68%) of the title compound as an
orange solid.
[1161] .sup.1H NMR (CDCl.sub.3) .delta.: 8.03 (2H, d, J=8.5 Hz),
7.60 (2H, d, J=8.5 Hz), 7.48-7.37 (3H, m), 4.80 (2H, s), 4.39 (2H,
q, J=7.1 Hz), 3.14 (1H, septet, J=6.8 Hz), 1.40 (3H, t, J=7.1 Hz),
1.27 (6H, d, J=6.8 Hz), 0.96 (9H, s), 0.12 (6H, s).
[1162] Methyl
{4-[4-(tert-butyl-dimethyl-silanyloxymethyl)-3-isopropyl-phe-
nylethynyl]-phenyl}-acetate (Intermediate 154)
[1163] Using General Procedure F;
tert-butyl-(4-ethynyl-2-isopropyl-benzyl- oxy)-dimethyl-silane
(Intermediate 152, 355.0 mg, 1.26 mmols) and
methyl-(4-iodophenyl)-acetate (Reagent B, 349.0 mg, 1.26 mmols) in
triethylamine (8 mL) was treated with copper(I)iodide (60.0 mg,
0.32 mmol) and sparged with argon for 5 minutes.
Dichlorobis(triphenylphosphin- e)palladium(II) (222 mg, 0.32 mmol)
was added and the reaction mixture was stirred overnight at room
temperature. Column chromatography (2-5% EtOAc-hexanes) afforded
288.0 mg (66%) of the title compound as an orange oil.
[1164] .sup.1H NMR (CDCl.sub.3) .delta.: 7.49 (2H, d, J=8.5 Hz),
7.43-7.35 (3H, m), 7.25 (2H, d, J=8.5 Hz), 4.77 (2H, s), 3.69 (3H,
s), 3.63 (2H, s), 3.11 (1H, septet, J=6.7 Hz), 1.25 (6H, d, J=6.7
Hz), 0.94 (9H, s), 0.10 (6H, s).
[1165] Ethyl
[4-(4-hydroxymethyl-3-isopropyl-phenylethynyl)-benzoate (Compound
122, General Formula 6)
[1166] To a solution of ethyl
4-[4-(tert-butyl-dimethyl-silanyloxymethyl)--
3-isopropyl-phenylethynyl]-benzoate (Intermediate 153, 310.0 mg,
0.71 mmol) in 4 mL THF at 0.degree. C. was added tetrabutylammonium
fluoride (371.0 mg, 1.42 mmols; 1.4 mL of a 1M solution in THF).
The pale-yellow solution was stirred for 10 minutes and quenched by
the addition of ice cold H.sub.2O. The mixture was extracted with
Et.sub.2O and the combined organic layers were washed with H.sub.2O
and saturated aqueous NaCl before being dried (Na.sub.2SO.sub.4)
and concentrated under reduced pressure. Column chromatography
(20-30% EtOAc-hexanes) afforded 200.0 mg (87%) of the title
compound as a colorless solid.
[1167] .sup.1H NMR (CDCl.sub.3) .delta.: 7.98 (2H, d, J=8.5 Hz),
7.58 (2H, d, J=8.5 Hz), 7.48 (1H, s), 7.35 (2H, m), 4.71 (2H, s),
4.35 (2H, q, J=7.1 Hz), 3.19 (1H, septet, J=7.0 Hz), 2.51 (1H, s),
1.39 (3H, t, J=7.1 Hz), 1.25 (6H, d, J=7.0 Hz).
[1168] Methyl
[4-(4-hydroxymethyl-3-isopropyl-phenylethynyl)-phenyl]-aceta- te
(Compound 123, General Formula 6)
[1169] To a solution of methyl
{4-[4-(tert-butyl-dimethyl-silanyloxymethyl-
)-3-isopropyl-phenylethynyl]-phenyl}-acetate (Intermediate 154,
288.0 mg, 0.66 mmol) in 5 mL THF at 0.degree. C. was added
tetrabutylammonium fluoride (471.0 mg, 1.80 mmols; 1.8 mL of a 1M
solution in THF). The pale-yellow solution was stirred for 15
minutes and quenched by the addition of ice cold H.sub.2O. The
mixture was extracted with Et.sub.2O and the combined organic
layers were washed with H.sub.2O and saturated aqueous NaCl before
being dried (Na.sub.2SO.sub.4) and concentrated under reduced
pressure. Column chromatography (5-10o% EtOAc-hexanes) afforded
180.0 mg (85%) of the title compound as a colorless solid.
[1170] .sup.1H NMR (CDCl.sub.3) .delta.: 7.48 (3H, m), 7.32 (2H,
m), 7.24 (2H, d, J=8.5 Hz), 4.69 (2H, s), 3.68 (3H, s), 3.62 (2H,
s), 3.18 (1H, septet, J=7.0 Hz), 2.21 (1H, s), 1.25 (6H, d, J=7.0
Hz).
[1171] Ethyl [4-(4-bromomethyl-3-isopropyl-phenylethynyl)-benzoate
(Intermediate 155)
[1172] A solution of ethyl
[4-(4-hydroxymethyl-3-isopropyl-phenylethynyl)-- benzoate (Compound
122, 200.0 mg, 0.62 mmol) and triphenylphosphine (211.0 mg, 0.81
mmol) in 5 mL CH.sub.2Cl.sub.2 was cooled to 0.degree. C. and
N-bromosuccinimide (144.0 mg, 0.81 mmol) was added in 5 portions
over 20 minutes. The solution was warmed to 25.degree. C. and
stirred for 17 hours. The reaction was quenched by the addition of
dilute aqueous NaHCO.sub.3. The resulting mixture was extracted
with Et.sub.2O and the combined organic layers were washed with
H.sub.2O and saturated aqueous NaCl before being dried
(Na.sub.2SO.sub.4) and concentrated under reduced pressure. The
title compound, 220.0 mg (93%), was isolated by column
chromatography (5% EtOAc-hexanes) as a pale-yellow solid.
[1173] .sup.1H NMR (CDCl.sub.3) .delta.: 8.03 (2H, d, J=8.2 Hz),
7.59 (2H, d, J=8.2 Hz), 7.48 (1H, s), 7.31 (2H, m) 4.55 (2H, s),
4.39 (2H, q, J=7.1 Hz), 3.29 (1H, septet, J=7.0 Hz), 1.40 (3H, t,
J=7.1 Hz), 1.30 (6H, d, J=7.0 Hz).
[1174] Methyl
[4-(4-bromomethyl-3-isopropyl-phenylethynyl)-phenyl]-acetate
(Intermediate 156)
[1175] A solution of methyl
[4-(4-hydroxymethyl-3-isopropyl-phenylethynyl)- -phenyl]-acetate
(Compound 123, 180.0 mg, 0.56 mmol) and triphenylphosphine (190.0
mg, 0.73 mmol) in 5 mL CH.sub.2C.sub.2 was cooled to 0.degree. C.
and N-bromosuccinimide (130.0 mg, 0.73 mmol) was added in 5
portions over 20 minutes. The solution was warmed to 25.degree. C.
and stirred for 17 hours. The reaction was quenched by the addition
of dilute aqueous NaHCO.sub.3. The resulting mixture was extracted
with Et.sub.2O and the combined organic layers were washed with
H.sub.2O and saturated aqueous NaCl before being dried
(Na.sub.2SO.sub.4) and concentrated under reduced pressure. The
title compound, 212.0 mg (98%), was isolated by column
chromatography (5-10% EtOAc-hexanes) as a pale-yellow oil.
[1176] .sup.1H NMR (CDCl.sub.3) .delta.: 7.48 (3H, m), 7.28 (4H,
m), 4.55 (2H, s), 3.69 (3H, s), 3.63 (2H, s), 3.28 (1H, septet,
J=7.0 Hz), 1.30 (6H, d, J=7.0 Hz).
[1177] Ethyl
[4-(4-imidazol-1-yl-methyl-3-isopropyl-phenylethynyl)-phenyl]-
-benzoate (Compound 124, General Formula 6)
[1178] A solution of ethyl
[4-(4-bromomethyl-3-isopropyl-phenylethynyl)-be- nzoate
(Intermediate 155, 120.0 mg, 0.31 mmol) and 1-acetylimidazole (36.0
mg, 0.33 mmol) in 5 mL CH.sub.3CN was heated at 65.degree. C. for 4
hours and then at 55.degree. C. for 16 hours. The solution was
cooled to room temperature, diluted with H.sub.2O and made basic by
addition of Na.sub.2CO.sub.3, and extracted with EtOAc. The
combined organic layers were washed with H.sub.2O and saturated
aqueous NaCl, dried (MgSO.sub.4), and concentrated under reduced
pressure. Column chromatography (1% Et.sub.3N in 5% MeOH-EtOAc)
afforded 75.0 mg (65%) of the title compound as a colorless
solid.
[1179] .sup.1H NMR (CDCl.sub.3) .delta.: 8.03 (2H, d, J=8.5 Hz),
7.60 (2H, d, J=8.5 Hz), 7.53 (1H, d, J=1.5 Hz), 7.49 (1H, s), 7.35
(1H, dd, J=1.5, 7.9 Hz), 7.09 (1H, bs), 6.98 (1H, d, J=7.9 Hz),
6.85 (1H, bs), 5.19 (2H,'s), 4.39 (2H, q, J=7.1 Hz), 3.08 (1H,
septet, J=6.8 Hz), 1.40 (3H, t, J=7.1 Hz), 1.20 (6H, d, J=6.8
Hz).
[1180] Methyl
[4-(4-imidazol-1-yl-methyl-3-isopropyl-phenylethynyl)-phenyl-
]-acetate (Compound 125, General Formula 6)
[1181] A solution of methyl
[4-(4-bromomethyl-3-isopropyl-phenylethynyl)-p- henyl]-acetate
(Intermediate 156, 72.0 mg, 0.19 mmol) and 1-acetylimidazole (22.0
mg, 0.20 mmol) in 5 mL CH.sub.3CN was heated at 65.degree. C. for 8
h and then at 55.degree. C. for 16 hours. The solution was cooled
to room temperature, diluted with H.sub.2O and made basic by
addition of Na.sub.2CO.sub.3, and extracted with EtOAc. The
combined organic layers were washed with H.sub.2O and saturated
aqueous NaCl, dried (MgSO.sub.4), and concentrated under reduced
pressure. Column chromatography (0.5% Et.sub.3N in 5% MeOH-EtOAc)
afforded 40.0 mg (58%) of the title compound as a colorless
solid.
[1182] .sup.1H NMR (CDCl.sub.3) .delta.: 7.49 (4H, m), 7.33 (1H,
dd, J=1.5, 7.9 Hz), 7.28 (2H, d, J=8.5 Hz), 7.08 (1H, t, J=1.2 Hz),
6.95 (1H, d, J=7.9 Hz), 6.84 (1H, t, J=1.2 Hz), 5.17 (2H, s), 3.70
(3H, s), 3.64 (2H, s), 3.06 (1H, septet, J=6.8 Hz), 1.20 (6H, d,
J=6.8 Hz).
[1183]
[4-(4-Imidazol-1-yl-methyl-3-isopropyl-phenylethynyl)-phenyl]-benzo-
ic acid (Compound 126, General Formula 6)
[1184] Using General Procedure I; a solution of ethyl
[4-(4-imidazol-1-ylmethyl-3-isopropyl-phenylethynyl)-phenyl]-benzoate
(Compound 124, 75.0 mg, 0.20 mmol) in ethanol (4 mL) and
tetrahydrofuran (1 mL) was treated with NaOH (120.0 mg, 3.0 mmols,
3.0 mL of a 1N aqueous solution) and stirred overnight at room
temperature. Work-up afforded 68.0 mg (88%) of the title compound
as a colorless solid.
[1185] .sup.1H NMR (d.sub.4-MeOH) .delta.: 9.01 (1H, s), 8.01 (2H,
d, J=8.2 Hz), 7.63-7.57 (5H, m), 7.44 (1H, d, J=7.9 Hz), 7.29 (1H,
d, J=7.9 Hz), 5.59 (2H, s), 3.17 (1H, septet, J=6.8 Hz), 1.20 (6H,
d, J=6.8 Hz).
[1186]
[4-(4-Imidazol-1-yl-methyl-3-isopropyl-phenylethynyl)-phenyl]-aceti-
c acid (Compound 127, General Formula 6)
[1187] Using General Procedure I; a solution of methyl
[4-(4-imidazol
1-ylmethyl-3-isopropyl-phenylethynyl)-phenyl]-acetate (Compound
125, 40.0 mg, 0.11 mmol) in ethanol (4 mL) and tetrahydrofuran (1
mL) was treated with NaOH (120.0 mg, 3.0 mmols, 3.0 mL of a 1N
aqueous solution) and stirred overnight at room temperature.
Work-up afforded 22.0 mg (52%) of the title compound as a colorless
solid.
[1188] .sup.1H NMR (d.sub.4-MeOH) .delta.: 9.02 (1H, bs), 7.62 (1H,
t, J=1.4 Hz), 7.58 (2H, m), 7.49 (2H, d, J=8.2 Hz), 7.43 (1H, dd,
J=1.5, 7.9 Hz), 7.31 (3H, m), 5.58 (2H, s), 3.68 (2H, s), 3.16 (1H,
septet, J=6.7 Hz), 1.18 (6H, d, J=6.7 Hz).
[1189] 4-Bromo-N-cyclopropyl-2-methyl-benzamide (Intermediate
157)
[1190] A solution of 4-bromo-2-methylbenzoic acid and SOCl.sub.2
was refluxed for 3 hours, cooled to room temperature and
concentrated under reduced pressure. The residue was dissolved in
30 mL CH.sub.2Cl.sub.2 and combined with cyclopropyl amine (810.0
mg, 14.3 mmols) and pyridine (2.05 g, 26.0 mmols). The solution was
stirred for 18 hours and then diluted with EtOAc before being
washed with 5% aqueous HCl, saturated NaHCO.sub.3, and saturated
aqueous NaCl. The solution was dried (MgSO.sub.4) and concentrated
under reduced pressure leaving the title compound as a colorless
solid.
[1191] .sup.1H NMR (CDCl.sub.3) .delta.: 7.34 (1H, d, J=2.3 Hz),
7.28 (1H, dd, J=2.3, 8.2 Hz), 7.13 (1H, d, J=8.2 Hz), 6.10 (1H,
bs), 2.85 (1H, m), 2.37 (3H, s), 0.85 (2H, m), 0.59 (2H, m).
[1192] (4-Bromo-2-methyl-benzyl)-cyclopropyl-amine (Intermediate
158)
[1193] To a solution of 4-bromo-N-cyclopropyl-2-methyl-benzamide
(Intermediate 157, 1.81 g, 7.12 mmols) in THF (12 mL) was added
BH.sub.3.SMe.sub.2 (1.08 g, 14.24 mmols). The solution was heated
to 60.degree. C. for 6 hours, cooled to room temperature and
carefully treated with saturated aqueous Na.sub.2CO.sub.3 (30 mL)
and stirred for 17 hours. This mixture was extracted with EtOAc and
the combined organic layers were washed with H.sub.2O, saturated
aqueous NaCl before being dried (MgSO.sub.4) and concentrated under
reduced pressure. The title compound was isolated by column
chromatography (10-15% EtOAc-hexanes).
[1194] .sup.1H NMR (CDCl.sub.3) .delta.: 7.26 (2H, m), 7.12 (1H, d,
J=7.9 Hz), 3.76 (2H, s), 2.31 (3H, s), 2.14 (1H, m), 0.44 (2H, m),
0.36 (2H, m).
[1195] (4-Bromo-2-methyl-benzyl)-cyclopropyl-ethyl-amine
(Intermediate 159)
[1196] A mixture of (4-bromo-2-methyl-benzyl)-cyclopropyl-amine
(Intermediate 158, 600.0 mg, 2.49 mmols), ethyl iodide (1.56 g,
10.0 mmols), and K.sub.2CO.sub.3 (690.0 mg, 5.00 mmols) in 10 mL
acetone was heated at 60.degree. C. for 18 hours. The mixture was
cooled to room temperature, diluted with H.sub.2O, and extracted
with EtOAc. The combined organic layers were washed with H.sub.2O
and saturated aqueous NaCl before being dried (MgSO.sub.4) and
concentrated under reduced pressure. The title compound was
isolated by column chromatography (2.5% EtOAc-hexanes).
[1197] .sup.1H NMR (CDCl.sub.3) .delta.: 7.23 (2H, m), 7.12 (1H, d,
J=7.6 Hz), 3.62 (2H, s), 2.56 (2H, q, J=7.3 Hz), 2.29 (3H, s), 1.75
(1H, m), 1.04 (3H, t, J=7.3 Hz), 0.39 (2H, m), 0.30 (2H, m).
[1198]
Cyclopropyl-ethyl-(2-methyl-4-trimethylsilanylethynyl-benzyl-amine
(Intermediate 160)
[1199] Using General Procedure D;
(4-bromo-2-methyl-benzyl)-cyclopropyl-et- hyl-amine (Intermediate
159, 620.0 mg, 2.31 mmols) in triethylamine (8 mL) was treated with
copper(I)iodide (44.0 mg, 0.23 mmol) and then sparged with argon
for 15 minutes. Trimethylsilylacetylene (1.04 g, 10.6 mmols) was
then added followed by
dichlorobis-(triphenylphosphine)palladium(II) (162.0 mg, 0.23
mmol). The resulting reaction mixture was heated to 70.degree. C.
for 5 days. The title compound (650.0 mg, 98%) was isolated by
chromatography (1-4% EtOAc-hexanes).
[1200] .sup.1H NMR (CDCl.sub.3) .delta.: 7.32 (1H, s), 7.20 (2H,
m), 3.65 (2H, s), 2.55 (2H, q, J=7.3 Hz), 2.28 (3H, s), 1.74 (1H,
m), 1.03 (3H, t, J=7.3 Hz), 0.36 (2H, m), 0.27 (2H, m), 0.24 (9H,
s).
[1201] Cyclopropyl-ethyl-(4-ethynyl-2-methyl-benzyl)-amine
(Intermediate 161)
[1202] Using General Procedure E;
cyclopropyl-ethyl-(2-methyl-4-trimethyls-
ilanylethynyl-benzyl)-amine (Intermediate 160, 650.0 mg, 2.30
mmols) in methanol (10 mL) was treated with potassium carbonate
(100.0 mg, 0.72 mmol) and stirred overnight at ambient temperature.
The crude alkyne (495 mg, 99%) was used directly in the next
reaction.
[1203] .sup.1H NMR (CDCl.sub.3) .delta.: 7.32 (1H, s), 7.21 (2H,
m), 3.66 (2H, s), 3.01 (1H, s), 2.56 (2H, q, J=7.3 Hz), 2.29 (3H,
s), 1.76 (1H, m), 1.04 (3H, t, J=7.3 Hz), 0.40 (2H, m), 0.29 (2H,
m).
[1204] Ethyl
4-{4-[(cyclopropyl-ethyl-amino)-methyl]-3-methyl-phenylethyny-
l}-benzoate (Compound 128, General Formula 6)
[1205] Using General Procedure F;
cyclopropyl-ethyl-(4-ethynyl-2-methyl-be- nzyl)-amine (Intermediate
161, 190.0 mg, 0.89 mmol) and ethyl-4-iodo benzoate (Reagent A,
245.0 mg, 0.89 mmol) in triethylamine (5 mL) was treated with
copper(I)iodide (56.0 mg, 0.30 mmol) and sparged with argon for 15
minutes. Dichlorobis(triphenylphosphine)-palladium(II) (208 mg,
0.30 mmol) was added and the reaction mixture was stirred overnight
at room temperature. Column chromatography (3-5% EtOAc-hexanes)
afforded the title compound.
[1206] .sup.1H NMR (CDCl.sub.3) .delta.: 8.01 (2H, d, J=8.2 Hz),
7.56 (2H, d, J=8.2 Hz), 7.31-7.24 (3H, m), 4.38 (2H, q, J=7.1 Hz),
3.68 (2H, s), 2.58 (2H, q, J=7.3 Hz), 2.32 (3H, s), 1.77 (1H, m),
1.39 (3H, t, J=7.1 Hz), 1.05 (3H, t, J=7.3 Hz), 0.39 (2H, m), 0.31
(2H, m).
[1207] Methyl
(4-{4-[(cyclopropyl-ethyl-amino)-methyl)-3-methyl-phenylethy-
nyl]-phenyl)-acetate) (Compound 129, General Formula 6)
[1208] Using General Procedure F;
cyclopropyl-ethyl-(4-ethynyl-2-methyl-be- nzyl)-amine (Intermediate
161, 300.0 mg, 1.41 mmols) and methyl-(4-iodophenyl)-acetate
(Reagent B, 388.0 mg, 1.41 mmols) in triethylamine (8 mL) was
treated with copper(I)iodide (67.0 mg, 0.35 mmol) and sparged with
argon for 15 minutes. Dichlorobis(triphenylphosphi-
ne)palladium(II) (246 mg, 0.35 mmol) was added and the reaction
mixture was stirred overnight at room temperature. Column
chromatography (5-7% EtOAc-hexanes) afforded 270.0 mg (53%) of the
title compound as a pale-yellow oil.
[1209] .sup.1H NMR (CDCl.sub.3) .delta.: 7.47 (2H, d, J=7.9 Hz),
7.30-7.22 (5H, m), 3.70 (3H, s), 3.68 (2H, s), 3.63 (2H, s), 2.58
(2H, q, J=7.3 Hz), 2.32 (3H, s), 1.77 (1H, m), 1.05 (3H, t, J=7.3
Hz), 0.39 (2H, m), 0.30 (2H, m).
[1210]
4-{4-[(Cyclopropyl-ethyl-amino)-methyl]-3-methyl-phenylethynyl}-ben-
zoic acid: (Compound 130, General Formula 6)
[1211] Using General Procedure I; a solution of ethyl
4-{4-[(cyclopropyl-ethyl-amino)-methyl]-3-methyl-phenylethynyl}-benzoate
(Compound 128, 130.0 mg, 0.36 mmol) in ethanol (5 mL) and
tetrahydrofuran (5 mL) was treated with NaOH (360.0 mg, 9.0 mmols,
3.0 mL of a 3N aqueous solution) and stirred overnight at room
temperature. Work-up afforded 115.0 mg (96%) of the title compound
as a colorless solid.
[1212] .sup.1H NMR (d.sub.6-acetone) .delta.: 8.05 (2H, d, J=8.2
Hz), 7.64 (2H, d, J=8.2 Hz), 7.32 (3H, m), 3.73 (2H, s), 2.59 (2H,
q, J=7.3 Hz), 2.35 (3H, s), 1.83 (1H, m), 1.05 (3H, t, J=7.3 Hz),
0.38 (2H, m), 0.27 (2H, m).
[1213]
(4-4-[(Cyclopropyl-ethyl-amino)-methyl]-3-methyl-phenylethynyl}-phe-
nyl)-acetic acid (Compound 131, General Formula 6)
[1214] Using General Procedure I; a solution of methyl
(4-{4-[(cyclopropyl-ethyl-amino)-methyl]-3-methyl-phenylethynyl}-phenyl)--
acetate (Compound 129, 140.0 mg, 0.39 mmol) in ethanol (5 mL) and
tetrahydrofuran (5 mL) was treated with NaOH (360.0 mg, 9.0 mmols,
3.0 mL of a 3N aqueous solution) and stirred overnight at room
temperature. Work-up followed by HPLC (Partisil-10 pac 10%
H.sub.2O--CH.sub.3CN) afforded the title compound.
[1215] .sup.1H NMR (CDCl.sub.3) .delta.: 7.45 (2H, d, J=8.2 Hz),
7.25 (5H, m), 4.16 (2H, m), 3.82 (2H, s), 3.56 (2H, s), 2.75 (2H,
q, J=7.3 Hz), 2.30 (3H, s), 1.86 (1H, m), 1.14 (3H, t, J=7.3 Hz),
0.54 (2H, m), 0.46 (2H, m).
[1216] Ethyl
{4-(4-cyclopropylaminomethyl-3-isopropyl-phenylethynyl}-benzo- ate
(Compound 132, General Formula 6)
[1217] A solution of ethyl
[4-(4-bromomethyl-3-isopropyl-phenylethynyl)-be- nzoate
(Intermediate 155, 110.0 mg, 0.29 mmol) and cyclopropylamine (420.0
mg, 7.4 mmols) in EtOH (5 mL) was stirred at 25.degree. C. for 6
hours and then concentrated under reduced pressure. The residue was
dissolved in EtOAc and washed with saturated aqueous NaHCO.sub.3,
H.sub.2O and saturated aqueous NaCl. The solution was dried
(MgSO.sub.4) and concentrated under reduced pressure to give 103 mg
(99%) of the title compound as an orange oil.
[1218] .sup.1H NMR (CDCl.sub.3) .delta.: 8.01 (2H, d, J=8.5 Hz),
7.59 (2H, d, J=8.5 Hz), 7.47 (1H, s), 7.30 (2H, m), 4.38 (2H, q,
J=7.1 Hz), 3.89 (2H, s), 3.26 (1H, septet, J=7.0 Hz), 2.17 (1H, m),
1.40 (3H, t, J=7.1 Hz), 1.26 (6H, d, J=7.0 Hz), 0.45 (2H, m), 0.39
(2H, m).
[1219] Ethyl
4-{4-[(cyclopropyl-ethyl-amino)-methyl]-3-isopropyl-phenyleth-
ynyl}-benzoate (Compound 133, General Formula 6)
[1220] To a solution of ethyl
{4-(4-cyclopropylaminomethyl-3-isopropyl-phe- nylethynyl}-benzoate
(Compound 132, 103.0 mg, 0.29 mmol) in 6 mL of acetone was added
ethyl iodide (67.0 mg, 0.43 mmol) and K.sub.2CO.sub.3 (79.0 mg,
0.57 mmol). The mixture was stirred at 60.degree. C. for 6 hours,
cooled to room temperature and quenched by the addition of
H.sub.2O. The mixture was extracted with EtOAc and the combined
organic layers were washed with H.sub.2O and saturated aqueous NaCl
before being dried (MgSO.sub.4) and concentrated under reduced
pressure. Column chromatography (4-5% EtOAc-hexanes) afforded 68.0
mg (59%) of the title compound.
[1221] .sup.1H NMR (CDCl.sub.3) .delta.: 8.01 (2H, d, J=8.6 Hz),
7.58 (2H, d, J=8.6 Hz), 7.44 (1H, s), 7.28 (2H, m), 4.39 (2H, q,
J=7.1 Hz), 3.73 (2H, s), 3.55 (1H, septet, J=6.6 Hz), 2.57 (2H, q,
J=7.3 Hz), 1.75 (1H, m), 1.40 (3H, t, J=7.1 Hz), 1.22 (6H, d, J=6.6
Hz), 1.05 (3H, t, J=7.3 Hz), 0.37 (2H, m), 0.28 (2H, m).
[1222] 4-{
4-[(Cyclopropyl-ethyl-amino)-methyl]-3-isopropyl-phenylethynyl}-
-benzoic acid (Compound 134, General Formula 6)
[1223] Using General Procedure I; a solution of ethyl
4-{4-[(cyclopropyl-ethyl-amino)-methyl]-3-isopropyl-phenylethynyl}-benzoa-
te (Compound 133, 68.0 mg, 0.17 mmol) in ethanol (3 mL) and
tetrahydrofuran (3 mL) was treated with NaOH (600.0 mg, 15.0 mmols,
3.0 mL of a 5N aqueous solution) and stirred overnight at room
temperature and then at 55.degree. C. for 9 hours. Work-up followed
by crystallization of the solid residue from hot CH.sub.3CN
afforded 45.0 mg (72%) of the title compound as a pale-yellow
solid.
[1224] .sup.1H NMR (d.sub.6-acetone) .delta.: 8.05 (2H, d, J=8.1
Hz), 7.66 (2H, d, J=8.1 Hz), 7.49 (1H, s), 7.32 (2H, m), 3.78 (2H,
s), 3.44 (1H, septet, J=6.7 Hz), 2.59 (2H, q, J=7.3 Hz), 1.80 (1H,
m), 1.21 (6H, d, J=6.7 Hz), 1.05 (3H, t, J=7.3 Hz), 0.40 (2H, m),
0.26 (2H, m).
[1225] Methyl
[4-(8,8-dimethyl-5-oxo-5,6,7,8-tetrahydro-naphthalen-2-yl-et-
hynyl)-phenyl]-acetate (Compound 4, General Formula 8)
[1226] Using General Procedure F;
6-ethynyl-4,4-dimethyl-3,4-dihydro-2H-na- phthalen-1-one
(Intermediate 13, 190.0 mg, 0.96 mmol) and
methyl-(4-iodophenyl)-acetate (Reagent B, 245.0 mg, 0.96 mmol) in
triethyl amine (8 mL) was treated with copper(I)iodide (46 mg, 0.24
mmol) and sparged with argon for 15 minutes.
Dichlorobis(triphenylphosphine)pal- ladium(II) (168 mg, 0.24 mmol)
was added and the reaction mixture was stirred overnight at room
temperature. Column chromatography (10-20% EtOAc-hexanes) afforded
250.0 mg (75%) of the title compound as a pale-yellow solid.
[1227] .sup.1H NMR(CDCl.sub.3).delta.:7.99(1H, d, J=7.9
Hz),7.57(1H, d, J=1.5 Hz),7.51 (2H, d, J=8.5 Hz), 7.43 (1H, dd,
J=1.5, 7.9 Hz), 7.29 (2H, d, J=8.5 Hz), 3.70 (3H, s), 3.65 (2H, s),
2.73 (2H, t, J=7.0 Hz), 2.04 (2H, t, J=7.0 Hz), 1.41 (6H, s).
[1228] Methyl
[4-(5-hydroxy-8,8-dimethyl-5,6,7,8-tetrahydro-naphthalen-2-y-
l-ethynyl)-phenyl]-acetate (Compound 135, General Formula 4)
[1229] To a solution of methyl
[4-(8,8-dimethyl-5-oxo-5,6,7,8-tetrahydro-n-
aphthalen-2-yl-ethynyl)-phenyl]-acetate (Compound 4) in 5 mL MeOH
at 0.degree. C. was added NaBH.sub.4 (18.0 mg, 0.48 mmol). The
reaction was stirred at 0.degree. C. for 2 hours and then quenched
by the addition of H.sub.2O. The solution was diluted with
Et.sub.2O and washed with H.sub.2O and saturated aqueous NaCl
before being dried (MgSO.sub.4) and the solvents were removed under
reduced pressure. Column chromatography (20-40% EtOAc-hexanes)
afforded 140.0 mg (87%) of the title compound as a colorless
oil.
[1230] .sup.1H NMR (CDCl.sub.3) .delta.: 7.49 (3H, m), 7.39 (1H, d,
J=7.9 Hz), 7.31 (1H, dd, J=1.5, 7.9 Hz), 7.25 (2H, d, J=8.2 Hz),
4.58 (1H, bs), 3.68 (3H, s), 3.62 (2H, s), 2.05 (1H, m), 1.79 (2H,
m), 1.60 (1H, m), 1.33 (3H, s), 1.26 (3H, s).
[1231] Methyl
[4-(5-imidazol-1-yl-8,8-dimethyl-5,6,7,8-tetrahydro-naphthal-
en-2-ylethynyl)-phenyl]-acetate (Compound 136, General Formula
4)
[1232] A solution of methyl
[4-(5-hydroxy-8,8-dimethyl-5,6,7,8-tetrahydro--
naphthalen-2-ylethynyl)-phenyl]-acetate (Compound 135, 140.0 mg,
0.40 mmol) and carbonyldiimidazole (136.0 mg, 0.84 mmol) in 5 mL
THF was heated to 65.degree. C. for 48 hours. The solution was
cooled to room temperature and concentrated under reduced pressure.
The residue was dissolved in Et.sub.2O and washed with 5% aqueous
NaOH, H.sub.2O, and saturated aqueous NaCl before being dried
(Na.sub.2SO.sub.4) and concentrated under reduced pressure. Column
chromatography (5% MeOH--CH.sub.2Cl.sub.2) afforded 50.0 mg (31%).
of the title compound as a colorless solid.
[1233] .sup.1H NMR (CDCl.sub.3) .delta.: 7.57 (1H, d, J=1.5 Hz),
7.52-7.45 (3H, m), 7.27 (3H, m), 7.08 (1H, s), 6.81 (2H, m), 5.30
(1H, t, J=5.8 Hz), 3.71 (3H, s), 3.65 (2H, s), 2.20 (2H, m), 1.75
(2H, m), 1.40 (3H, s), 1.36 (3H, s).
[1234]
[4-(5-Imidazol-1-yl-8,8-dimethyl-5,6,7,8-tetrahydro-naphthalen-2-yl-
-ethynyl)-phenyl]-acetic acid (Compound 137, General Formula 4)
[1235] Using General Procedure I; a solution of methyl
[4-(5-imidazol-1-yl-8,8-dimethyl-5,6,7,8-tetrahydro-naphthalen-2-yl-ethyn-
yl)-phenyl]-acetate (Compound 136, 50.0 mg, 0.13 mmol) in ethanol
(4 mL) was treated with NaOH (120.0 mg, 3.0 mmols, 3.0 mL of a 1N
aqueous solution) and stirred overnight at room temperature.
Work-up afforded 40.0 mg (83%) of the title compound as a
pale-orange solid.
[1236] .sup.1H NMR (d.sub.4-MeOH) .delta.: 8.93 (1H, s), 7.68 (1H,
s), 7.61 (1H, s), 7.54 (1H, s), 7.47 (2H, d, J=8.2 Hz), 7.31 (3H,
m), 6.95 (1H, d, J=8.2 Hz), 5.83 (1H, t, J=5.8 Hz), 3.68 (1H, s),
3.63 (1H, s), 2.38 (1H, m), 2.26 (1H, m), 1.76 (2H, m), 1.45 (3H,
s), 1.36 (3H, s).
[1237] Ethyl
[4-(5-imidazol-1-yl-8,8-dimethyl-5,6,7,8tetrahydro-naphthalen-
-2-yl-ethynyl)-benzoate (Compound 138, General Formula 4)
[1238] A solution of ethyl
[4-(5-hydroxy-8,8-dimethyl-5,6,7,8-tetrahydro-n-
aphthalen-2-yl-ethynyl)-benzoate (180.0 mg, 0.52 mmol) and
carbonyldiimidazole (176.0 mg, 1.08 mmol) in 5 mL THF was heated to
65.degree. C. for 21 hours. The solution was cooled to room
temperature and concentrated under reduced pressure. The residue
was dissolved in Et.sub.2O and washed with 55 aqueous NaOH,
H.sub.2O, and saturated aqueous NaCl before being dried
(Na.sub.2SO.sub.4) and concentrated under reuced pressure. Column
chromatography (5% MeOH--CH.sub.2Cl.sub.2) afforded 50.0 mg (24%)
of the title compound as a colorless solid.
[1239] .sup.1H NMR (CDCl.sub.3) .delta.: 8.03 (2H, d, J=7.9 Hz),
7.59 (3H, m), 7.46 (1H, s), 7.29 (1H, dd, J=1.5, 8.3 Hz), 7.09 (1H,
s), 6.82 (1H, d, J=8.2 Hz), 6.81 (1H, s), 5.31 (1H, t, J=5.8 Hz),
4.39 (2H, q, J=7.1 Hz), 2.20 (2H, m), 1.75 (2H, m), 1.40 (9H,
m).
[1240]
[4-(5-Imidazol-1-yl-8,8-dimethyl-5,6,7,8-tetrahydro-naphthalen-2-yl-
-ethynyl)-benzoic acid (Compound 139, General Formula 4)
[1241] Using General Procedure I; a solution of ethyl
[4-(5-imidazol-1-yl-8,8-dimethyl-5,6,7,8-tetrahydro-naphthalen-2-yl-ethyn-
yl)-benzoate (Compound 138, 50.0 mg, 0.13 mmol) in ethanol (3 mL)
and tetrahydrofuran (1 mL) was treated with NaOH (120.0 mg, 3.0
mmols, 3.0 mL of a 1N aqueous solution) and stirred overnight at
room temperature. Work-up afforded 40.0 mg (87%) of the title
compound as a colorless solid.
[1242] .sup.1H NMR (d.sub.4-MeOH) .delta.: 8.92 (1H, s), 8.04 (2H,
d, J=8.2 Hz), 7.74 (1H, d, J=1.5 Hz), 7.62 (3H, m), 7.57 (1H, t,
J=1.5 Hz), 7.38 (1H, dd, J=1.5, 7.9 Hz), 6.97 (1H, d, J=7.9 Hz),
5.83 (1H, t, J=5.8 Hz), 2.33(2H, m), 1.78 (2H, m), 1.47 (3H, s),
1.39 (3H, s).
[1243] 2-Isopropyl-4-trifluoromethanesulfonyloxy-benzyl acetate
(Intermediate 162)
[1244] To a solution of 4-hydroxymethyl-3-isopropylphenyl
1,1,1-trifluoromethanesulfonate (Intermediate 149, 190.0 mg, 0.64
mmol) in 5 mL CH.sub.2Cl.sub.2 was added acetyl chloride (75.0 mg,
0.96 mmol) and pyridine(101.0 mg, 1.38 mmols). After stirring for 3
hours at 25.degree. C. the reaction was quenched by the addition of
H.sub.2O and the resulting mixture extracted with EtOAc. The
combined organic layers were washed with H.sub.2O and saturated
aqueous NaCl, dried (MgSO.sub.4) and concentrated under reduced
pressure. The title compound, 182 mg (84%), was isolated from the
residual oil by column chromatography (5-10% EtOAc-hexanes) as a
colorless oil.
[1245] .sup.1H NMR (CDCl.sub.3) .delta.: 7.43 (1H, d, J=8.7 Hz),
7.19 (1H, d, J=2.7 Hz), 7.09 (1H, dd, J=2.7, 8.5 Hz), 5.17 (2H, s),
3.18 (1H, septet, J=6.7 Hz), 2.10 (3H, s), 1.26 (6H, d, J=6.7
Hz).
[1246] 4-Isopropenyloxymethyl-3-isopropyl-phenyl
1,1,1-trifluoromethanesul- fonate (Intermediate 163)
[1247] Using General Procedure 1;
2-isopropyl-4-trifluoromethanesulfonylox- y-benzyl acetate
(Intermediate 162, 182.0 mg, 0.54 mmols), and 1.1 mL of Tebbe's
Reagent (159.0 mg, 0.56 mmols) afforded 130.0 mg (72%) of the title
compound as a colorless oil after column chromatography (2-5%
EtOAc-hexanes).
[1248] .sup.1H NMR (CDCl.sub.3) .delta.: 7.43 (1H, d, J=8.5 Hz),
7.18 (1H, d, J=2.6 Hz), 7.09 (1H, dd, J=2.6, 8.5 Hz), 4.75 (2H, s),
3.98 (2H, s), 3.12 (1H, septet, J=6.7 Hz), 1.88 (3H, s), 1.25 (6H,
d, J=Hz).
[1249] 3-Isopropyl-4-(1-methyl-cyclopropoxymethyl)-phenyl
1,1,1-trifluoromethanesulfonate (Intermediate 164)
[1250] Using General Procedure 2;
4-isopropenyloxymethyl-3-isopropylphenyl
1,1,1-trifluoromethanesulfonate (Intermediate 163, 130.0 mg, 0.39
mmol), Et.sub.2Zn (272.0 mg, 2.2 mmols), and CH.sub.2I.sub.2 (702.0
mg, 2.6 mmols) in 3.0 mL Et.sub.2O afforded 120.0 mg (89%) of the
title compound as a colorless oil after column chromatography (4-5%
EtOAc-hexanes).
[1251] .sup.1H NMR (CDCl.sub.3) .delta.: 7.39 (1H, d, J=8.5 Hz),
7.13 (1H, d, J=2.7 Hz), 7.05 (1H, dd, J=2.7, 8.5 Hz), 4.54 (2H, s),
3.16 (1H, septet, J=6.7 Hz), 1.47 (3H, s), 1.24 (6H, d, J=6.7 Hz),
0.86 (2H, m), 0.48 (2H, m).
[1252]
[3-Isopropyl-4-(1-methyl-cyclopropoxymethyl)-phenylethynyl]-trimeth-
ylsilane (Intermediate 165)
[1253] Using General Procedure D;
3-isopropyl-4-(1-methyl-cyclopropoxymeth- yl)-phenyl
1,1,1-trifluoromethanesulfonate (Intermediate 164, 120.0 mg, 0.34
mmol) in triethylamine (2 mL) and anhydrous DMF (5 mL) was sparged
with argon for 5 minutes. Trimethylsilyl acetylene (700.0 mg, 0.71
mmol) was then added followed by
dichlorobis(triphenylphosphine)palladium(II) (24.0 mg, 0.03 mmol).
The resulting reaction mixture was heated to 95.degree. C. for 60
hours. The title compound 110.0 mg, (99%) was isolated by
chromatography (0-1% EtOAc-hexanes).
[1254] .sup.1H NMR (CDCl.sub.3) .delta.: 7.36 (1H, s), 7.24 (2H,
bs), 4.53 (2H, s), 3.11 (1H, septet, J=6.7 Hz), 1.45 (3H, s), 1.22
(6H, d, J=6.7 Hz), 0.85 (2H, m), 0.44 (2H, m), 0.25 (9H, s).
[1255]
4-Ethynyl-2-isopropyl-1-(1-methyl-cyclopropoxymethyl)-benzene
(Intermediate 166)
[1256] Using General Procedure E;
[3-isopropyl-4-(1-methyl-cyclopropoxymet-
hyl)-phenylethynyl]-trimethylsilane (Intermediate 165, 110.0 mg,
0.37 mmol) in methanol (6 mL) was treated with potassium carbonate
(80.0 mg, 0.58 mmol) and stirred overnight at ambient temperature.
The crude alkyne (84 mg, 100%) was used directly in the next
reaction.
[1257] .sup.1H NMR (CDCl.sub.3) .delta.: 7.55 (1H, s), 7.41 (2H,
m), 4.68 (2H, s), 3.26 (1H, septet, J=6.8 Hz), 3.18 (1H, s), 1.60
(3H, s), 1.37 (6H, d, J=6.8 Hz), 0.99 (2H, m), 0.59 (2H, m).
[1258] Methyl
{4-[3-isopropyl-4-(1-methyl-cyclopropoxymethyl)-phenylethyny-
l]-phenyl}-acetate (Compound 140, General Formula 6)
[1259] Using General Procedure F;
4-ethynyl-2-isopropyl-1-(1-methyl-cyclop- ropoxymethyl)-benzene
(Intermediate 166, 78.0 mg, 0.34 mmol) and
methyl-(4-iodophenyl)-acetate (Reagent B, 94.0 mg, 0.34 mmol) in
triethylamine (8 mL) was treated with copper(I)iodide (22.0 mg,
0.11 mmol) and sparged with argon for 5 minutes.
Dichlorobis(triphenylphosphin- e)palladium(II) (79 mg, 0.11 mmol)
was added and the reaction mixture was stirred at room temperature
for 3.5 hours. Column chromatography (2-5% EtOAc-hexanes) afforded
77.0 mg (60%) of the title compound as a yellow oil.
[1260] .sup.1H NMR (CDCl.sub.3) .delta.: 7.49 (2H, d, J=8.2 Hz),
7.43 (1H, d, J=1.5 Hz), 7.33-7.24 (4H, m), 4.55 (2H, s), 3.70 (3H,
s), 3.63 (2H, s), 3.14 (1H, septet, J=6.8 Hz), 1.47 (3H, s), 1.25
(6H, d, J=6.8 Hz), 0.86 (2H, m), 0.46 (2H, m).
[1261]
{4-[3-Isopropyl-4-(1-methyl-cyclopropoxymethyl)-phenylethynyl]-phen-
yl}-acetic acid (Compound 141, Formula 6)
[1262] Using General Procedure I; a solution methyl
{4-[3-isopropyl-4-(1-methyl-cyclopropoxymethyl)-phenylethynyl]-phenyl}-ac-
etate (Compound 140, 70.0 mg, 0.19 mmol) in ethanol (3 mL) and
tetrahydrofuran (3 mL) was treated with NaOH (240.0 mg, 6.0 mmols,
2.0 mL of a 3N aqueous solution) and stirred overnight at room
temperature. Work-up and purification by HPLC (Partisil 10-pac, 10%
H.sub.2O/CH.sub.3CN) afforded of the title compound as a colorless
solid.
[1263] .sup.1H NMR (CDCl.sub.3) .delta.: 7.50 (2H, d, J=8.2 Hz),
7.43 (1H, s), 7.33-7.24 (4H, m), 4.55 (2H, s), 3.65 (2H, s), 3.14
(1H, septet, J=6.7 Hz), 1.47 (3H, s), 1.25 (6H, d, J=6.7 Hz), 0.87
(2H, m), 0.46 (2H, m).
[1264] 2,6-Di-tert-butyl-4-trimethylsilanylethynyl-phenol:
(Intermediate 167)
[1265] Following General Procedure D and using
4-bromo-2,6-di-t-butyl-phen- ol (1.43 g, 5 mmol), triethyl amine (1
5 mL), anhydrous tetrahydrofuran (15 mL), copper(I)iodide (0.06 g,
0.31 mmol), trimethylsilyl acetylene (4.9 g, 50 mmol) and
dichlorobis(triphenylphosphine)palladium(II) (0.1 8 g, 0.26 mmol)
followed by flash column chromatography over silica gel (230-400
mesh) using hexane as eluent, the title compound was obtained (1.35
g, 90%).
[1266] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta.7.29 (s, 2H), 5.35
(s, 1H), 1.42 (s, 18H), 0.24 (s, 9H).
[1267]
(3,5-Di-tert-butyl-4-methoxy-phenylethynyl)-trimethyl-silane:
(Intermediate 168)
[1268] A solution
2,6-di-tert-butyl-4-trimethylsilanylethynyl-phenol (Intermediate
167, 0.302 g, 1 mmol) in acetone (5 mL) was treated with potassium
carbonate (0.138 g, 1 mmol) and methyl iodide (0.142 g, 1 mmol) and
stirred overnight at room temperature. The volatiles were distilled
off in vacuo and the residue was purified by flash column
chromatography on silica gel (230-400 mesh) using ethyl acetate as
the eluent to afford the title compound as a white solid (0.28 g,
90%).
[1269] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta.7.41 (s, 2H), 3.70
(s, 3H), 1.49 (s, 18H), 0.30 (s, 9H).
[1270] 1,3-Di-tert-butyl-5-ethynyl-2-methoxy-benzene: (Intermediate
169)
[1271] Following General Procedure E and
(3,5-di-tert-butyl-4-methoxy-phen- ylethynyl)-trimethyl-silane
(Intermediate 168, 0.28 g, 0.9 mmol), potassium carbonate (0.98 g,
7. 1 mmol) and methanol (10 mL) followed by flash column
chromatography over silica gel (230-400 mesh) using hexane as the
eluent, the title compound was obtained (0.23 g, 100%).
[1272] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.46 (s, 2H),
3.75 (s, 3H), 3.05 (s, 1H), 1.49 (s, 18H).
[1273]
[4-(3,5-Di-tert-butyl-4-methoxy-phenylethynyl)-phenyl]-acetic acid
methyl ester: (Compound 142, General Formula 5)
[1274] Following General Procedure F and using
1,3-di-tert-butyl-5-ethynyl- -2-methoxy-benzene (Intermediate 169,
0.094 g, 0.36 mmol), methyl-4-iodo phenyl acetate (Reagent B, 0.09
g, 0.32 mmol), triethyl amine (5 mL), anhydrous tetrahydrofuran (5
mL), copper(I)iodide (0.02 g, 0.1 mmol) and
dichlorobis(triphenylphosphine)palladium(II) (0.06 g, 0.085 mmol)
followed by flash column chromatography over silica gel (230-400
mesh) using 10% ethyl acetate in hexane as the eluent, the title
compound (0.114 g, 81%) was obtained as an oil.
[1275] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.52 (d, 2H,
J=8.0 Hz), 7.46 (s, 2H), 7.28 (d, 2H, J=8.2 Hz), 3.72 (s, 3H),
3.71(s, 3H), 3.66 (s, 2H), 1.47 (s, 18H).
[1276] [4-(3
5-Di-tert-butyl-4-methoxy-phenylethynyl)-phenyl]-acetic acid:
(Compound 143, General Formula 5)
[1277] Following General Procedure I and using
[4-(3,5-di-tert-butyl-4-met- hoxy-phenylethynyl)-phenyl]-acetic
acid methyl ester (Compound 142, 0.114 g, 0.29 mmol), 5M aqueous
sodium hydroxide solution (2 mL) and ethanol (4 mL), followed by
preparative reverse phase HPLC using 10% water in acetonitrile as
the mobile phase, the title compound was obtained as a white solid
(0.097 g, 88%).
[1278] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.55(d, 2H, J=8.0
Hz), 7.48 (s, 2H), 7.30 (d, 2H, J=8.2 Hz), 3.74 (s, 3H), 3.69 (s,
2H), 1.49 (s, 18H).
[1279]
[4-(3,5-Di-tert-butyl-4-methoxy-phenylethynyl)-2-fluoro-phenyl]-ace-
tic acid methyl ester: (Compound 144, General Formula 5) Following
General Procedure F and using
1,3-di-tert-butyl-5-ethynyl-2-methoxy-benzene (Intermediate 169,
0.087 g, 0.33 mmol), methyl-2-fluoro-4-iodo phenyl acetate (Reagent
H, 0.088 g, 0.30 mmol), triethyl amine (5 mL), anhydrous
tetrahydrofuran (10 mL), copper(I)iodide (0.02 g, 0.1 mmol) and
dichlorobis(triphenylphosphine)palladium(II) (0.06 g, 0.085 mmol)
followed by flash column chromatography over silica gel (230-400
mesh) using 10% ethyl acetate in hexane as the eluent, the title
compound (0. 122 g, 89%) was obtained.
[1280] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.46 (s, 2H),
7.33-7.24 (m, 3H), 3.75 (s, 3H), 3.73(s, 3H), 3.72 (s, 2H), 1.48
(s, 18H).
[1281]
[4-(3,5-Di-tert-butyl-4-methoxy-phenylethynyl)-2-fluoro-phenyl]-ace-
tic acid: (Compound 145, General Formula 5)
[1282] Following General Procedure I and using
[4-(3,5-di-tert-butyl-4-met-
hoxy-phenylethynyl)-2-fluoro-phenyl]-acetic acid methyl ester
(Compound 144, 0.122 g, 0.29 mmol), 5M aqueous sodium hydroxide
solution (1 mL) and ethanol (4 mL), followed preparative reverse
phase HPLC using 10% water in acetonitrile as the mobile phase, the
title compound was obtained as a white solid (0.77 g, 65%).
[1283] .sup.1H NMR (300 MHz, CDCl.sub.3): .delta. 7.42 (s, 2H),
7.29-7.19 (m, 3H), 3.71 (s, 2H), 3.69 (s, 3H), 1.43 (s, 18H).
* * * * *